Site log - Melbourne (Jan 1998) Flags: 1-Satellite coincidence data 2-Scan in TSDIS data 3-Scan not in TSDIS data A-Major problem (moderate to strong AP &/or widespread coverage) B-Minor problem (weak AP &/or very litte coverage) *********************************************************************************************** 01 Jan 98: No precipitation. Data processed: 0005-2357 Z Satellite coincidence: 1332Z, 1509Z, 1646Z, 1823Z, 1959Z QC notes: no precip, no problems *********************************************************************************************** 02 Jan 98: Very weak showers moving onshore throughout the day. Data processed: 0007-2357 Z Satellite coincidence: 1220Z, 1356Z, 1710, 1847Z, QC notes: 1045-2103Z: holes and gaps in light precipitation 2B !!FLAG!! -----> holes corrected but in doing so, some very weak AP was re-introduced. This barely desreves a flag 2202-2217Z: moderate AP splotch remaining near radar -----> corrected *********************************************************************************************** 03 Jan 98: Widely scattered, weak showers moving onshore throughout the entire day. Data processed: 0003-2358 Z Satellite Coincidence: 1244Z, 1421Z, 1558Z, 1734Z QC notes: 0003-1543Z: holes and gaps in light precipitation 2B !!FLAG!! -----> removal of precip was corrected but in doing so, some weak AP was re-introduced to VOSs before 05Z. Often, the AP is <= 10 dB so this consider this flag very minor. 1844-1934Z: holes and gaps in light precipitation 2B !!FLAG!! -----> removal of precip was corrected but in doing so, some weak AP was re-introduced to VOSs before 1909Z. However, the AP is <= 10 dB so this consider this flag very minor. 2004-2358Z: holes and gaps in light precipitation 2B !!FLAG!! -----> removal of precip was corrected but in doing so, some weak AP was re-introduced to VOSs before 21Z. However, the AP is <= 10 dB so this consider this flag very minor. *********************************************************************************************** 04 Jan 98: Scattered showers off the coast early on give way to more convective cells as storms ahead of a larger complex (slightly out of range to SE) fire over ocean and land the rest of the day. Data processed: 0004-2359 Z Satellite Coincidence: 0132Z, 1308Z, 1622Z, 1759Z QC notes: 0004-2359Z: holes and gaps in light precipitation -----> corrected ********************************************************************************************** 05 Jan 98: Light showers with occasional convection moving onto the coast the entire day. Data processed: 0004-2359 Z Satellite Coincidence: 1156Z, 1510Z, 1646Z QC notes: 0004-2359Z: holes and gaps in light precipitation -----> corrected *********************************************************************************************** 06 Jan 98: Showers with more convective cells toward the end of the time period moving onto the coast during the entire period. Data processed: 0004-1350 Z 1515-1828 Z Satellite Coincidence: 1220Z, 1534Z, 1710Z QC notes: 0004-1828Z: holes and gaps in light precipitation -----> corrected. Tiny speck of clutter shows up over the radar after reprocessing but is deemed negligible ********************************************************************************************** 07 Jan 98: Light showers and weak cells streaming to the north during the entire period. Data processed: 1245-2357 Z Satellite Coincidence: 0931Z, 1107Z, 1421Z, 1558Z QC notes: 1245-2357Z: holes and gaps in light precipitation 2B !!FLAG!! -----> the holes in light precip was corrected but some weak AP was re0introduced to the VOS's between 13 and 15Z. AP could not be removed without affecting light precip. ********************************************************************************************** 08 Jan 98: Scattered convection and showers until large MCS squall line system starts moving in from the west around 10Z. The squall line (with large stratiform region) tracks across the scope and eventually moves off the coast. Copious amounts of rain from system. Data processed: 0002-2357 Z Satellite Coincidence: 0955Z, 1132Z, 1445Z, 1621Z QC notes: 0002-0457Z: holes and gaps in light precip -----> corrected 1414-2118Z: precip hole around radar (need to lower Z2) -----> corrected ********************************************************************************************** 09 Jan 98: Residual light showers behind the squall line which moves off the scope early in the day. Data processed: 0002-2352 Z Satellite Coincidence: 0842Z, 1019Z, 1332Z, 1509Z QC notes: 0122-0322Z: holes and gaps in light precipitation 2B !!FLAG!! -----> the missing precip problem was fixed but in doing so, a weak-to-moderate AP speck was re-introduced to NW of the radar for most of the VOS's of between 02-03Z. The small coverage and relatively weak reflectivity of this AP leads me to flag it as minor. 0443Z: intense AP speck remaining NW of radar -----> corrected 0513-0543Z: moderate-to-intense AP specks remaining N of radar 3A -----> could not remove strong specks without affecting light precip in field. Although the AP possesses a very small area, a major flag was given due to the small, yet intense, AP's proximity to KSC rain guages. The good news though is that I moved 0533Z to the bad_files directory since 0538Z contains no AP. Therefore, no files containing AP are going to TSDIS. 0638-0808Z: intense AP speck N of radar 2A -----> removed some of the lighter specks but the intense ones held fast. Could not remove intense specks without removing light precip. Once again flagged as major because I am worried about these 50+ dB specks being near the KSC rain gauges. 0918-1038Z: moderate-to-intense AP specks remaining N of radar 1A/B -----> could not remove AP specks without removing light precip. flagged as both major and minor is due once again to rain gauges...from our images it is difficult to determine if intense AP specks oare over rain gauges. If the 50 dB specks are over rain gauges then this is a major flag otherwise this flag is minor since the area of the AP is so small. 1003-1203Z: 10 km ring of missing precip surrounding radar (Z@ problem) 1B -----> hole in precip was corrected but in doing so, some light ground clutter was re-introduced ********************************************************************************************** 10 Jan 98: A few convective cells off the coast early on and then no precipitation during the rest of the day. Data processed: 0002-2355 Z Satellite Coincidence: 0906Z, 1043Z, 1220Z, 1356Z QC notes: 0012-0437Z: holes and gaps in light precipitation -----> corrected 1238-1544Z: scattered weak-to-moderate AP throughout scope -----> corrected 1633-1742Z: weak AP remaining SE of radar -----> corrected 2335-2345Z: moderate AP speck near radar -----> corrected ********************************************************************************************** 11 Jan 98: Extremely light precip early on (before 05Z) and that is all the precipitation on this day. Data processed: 0005-2358 Z Satellite Coincidence: 0930Z, 1243Z, 1420Z QC notes: 0222-0440Z: holes and gaps in light precipitation 2B !!FLAG!! -----> the holes in the very light precip was fixed but in doing so, some very weak AP was reintroduced to the west of the radar. Since the precip is so light, any attempt to remove the AP also removed the true echo. THis precip is so light it may not even be reaching the ground but it is up to the PI to decide which method of attack is more important. 0717-1221Z: scattered AP of all intensities remaining -----> corrected 2141-2200Z: weak AP remaining NW of radar -----> corrected 2319-2358Z: weak-to-moderate AP remaining NW of radar -----> corrected ********************************************************************************************** 12 Jan 98: Only precipitation is a shield of very light, extremely shallow precip which moves in later in the day. Data processed: 0008-1313 Z 1855-2357 Z Satellite Coincidence: 0817Z, 0954Z, 1307Z QC notes: 0008-0739Z: scattered AP of all intensities remaining -----> corrected 0917-1313Z: scattered weak-to-moderate AP remaining -----> corrected 1906-2021Z: weak AP remaining 2B !!FLAG!! -----> could not remove AP without removing weak, shallow precip 1942-2357Z: holes and gaps in light precip 2B !!FLAG!! -----> holes corrected but some very weak AP reintroduced which (1942-2209) doesn't seem to be a concern 2A !!FLAG!! -----> precip becomes so shallow (if it is precip since it is (2218-2357) not present in the second sweep up) that all height parameters along with Z0 and Z1 had to be turned off in order to fill in holes in the precip shield. Obviously, this resulted in little QC being done and a strong clutter signal remains (>35 dB). Once again this falls into the category of which is more important from a QC standpoint and am waiting for PI input before a strategy plan....until than any tru echo will be kept at all costs. *********************************************************************************************** 13 Jan 98: Shield of light and very shallow precip early and only widely scattered light precip which mostly hangs out at the end of the scope. Data processed: 0006-1213 Z 1628-2358 Z Satellite Coincidence: 0841Z, 1155Z, 1331Z QC notes: 0006-0412Z: holes and gaps in light precipitation 2A !!FLAG!! ------> the holes were corrected but due to the extreme (0006-0055) shallow nature of the precip, all height parameters along with Z0 and Z1 had to be turned off in order to fill in holes in the precip shield. Obviously, this resulted in little QC being done and a strong clutter signal remains (>35 dB). Once again this falls into the category of which is more important from a QC standpoint and am waiting for PI input before a strategy plan....until than any tru echo will be kept at all costs. 2B !!FLAG!! -----> holes corrected but some very weak AP reintroduced which (0105-0412) at times does reach the moderate range in some specks. Still flagged as minor though due to the small areal coverage of the AP 0550Z: weak AP remaining near and NNW of radar -----> corrected 2023-2230Z: holes and gaps in light precipitation -----> corrected ************************************************************************************************ 14 Jan 98: Only a couple of weak showers and cells east of the radar. A shield of weak precipitation skirts the northern and western fringe while a more moderate shield of precip skirts the SE fringe but neither area of rain comes within range of the radar. Data processed: 0009-1205 Z 1740-2359 Z Satellite coincidence: 0552Z, 0729Z, 0905Z, 1042Z, 1219Z QC notes: 0839-0908Z: wiping out weak, isolated showers E of radar -----> corrected 1106-1126Z: moderate-to-intense AP specks remaining S of radar; most likely out of range so clean up is only for aesthetics. -----> could not remove AP at southern fringe without affecting precip at northern fringe. Not flagged since all of this is a moot point since all appears to be beyond 150 km....only noted in case any AP does enter this range (unlikely) 1205Z: weak AP S of radar 1B- !!FLAG!! -----> could not remove AP without affecting precip. However, flag is very minor (hence B-) since most, if not all, is beyond 150 km. ************************************************************************************************ 15 Jan 98: Light precip scattered through scope early on increases as concentrated area moves out of the south. This area dissipates but another shield starts creeping in from the west. This area of moderate precipitation fills the entire scope. Stronger embedded convection is also present as copius rain falls throughout the scope. Data processed: 0004-2356 Z Satellite coincidence: 0616Z, 0753Z, 1107Z, 1243Z QC notes: 0049-0434Z: holes and gaps in light precipitation -----> corrected 0439-0844Z: holes in extremely shallow precipitation 1A- !!FLAG!! -----> holes corrected but since precip is very shallow had to turn the parameters way down (and Z0 off) to put all true echo back in the field. Unfortunately, this also caused clutter specks and splotches near the radar to be re-introduced. Some off the AP is intense which is the reason for the major flag but they inhabit little area so the A flag was reduced to A-. 0849-0934Z: holes in extremely shallow precipitation which is very close if not right on top of the radar 2B !!FLAG!! -----> holes corrected but since precip is very shallow had to turn the parameters way down (and Z0 off) to put all true echo back in the field. Unfortunately, this also caused clutter specks to be re-introduced. But, unlike the above flagged time period, these specks are not as strong and are even smaller so they were only flagged as minor. The semicircle of echo removal to the east of the radar is not a concern since it is only removing echo <= 5 dB along with AP. which further complicates things 1143-1248Z: 10 km ring of missing precip surrounding radar (Z2 problem) 1B !!FLAG!! -----> hole in precip corrected but some weak-to-moderate ground clutter specks were re-introduced. They could not be removed without removing precip 1253Z: precip-eating mode (Z0 problem) -----> corrected 1456-1501Z: 10 km ring of missing precip surrounding radar 3B !!FLAG!! -----> hole in precip corrected but some weak ground clutter was re-introduced in the process. Moved VOS 1501Z to bad_files_not_in_1C.HDF directory 1536-1606Z: 10 km ring of missing precip surrounding radar -----> corrected 1536-1711Z: holes and gaps in light precipitation -----> corrected 1906-2356Z: 10 km ring of missing precip surrounding radar -----> corrected 2156-2356Z: holes and gaps in light precipitation -----> corrected *********************************************************************************************** 16 Jan 98: Squall line and large stratiform rain region continue to move across scope. Heavy rain for the first part of the day slowly diminishes so that by 14Z, most significant precipitation is beyond the range of the radar. Data processed: 0001-1326 Z 1538-2353 Z Satellite coincidence: 0544Z, 0641Z, 1131Z QC notes: 0001-0016Z: 10 km ring of missing precip surrounding radar -----> corrected 0001-0331Z: holes and gaps in light precipitation -----> corrected 0451-0812Z: 10 km ring of missing precip surrounding radar -----> corrected *********************************************************************************************** 17 Jan 98: No precipitation. Data processed: 0003-0635 Z 2315-2356 Z Satellite Coincidence: 0528Z, 0705Z, 0842Z, 1018Z QC notes: no precip, no problems ********************************************************************************************** 18 Jan 98: No precipitation. Data processed: 0002-2350 Z Satellite coincidence: 0416Z, 0552Z, 0906Z, 1042Z QC notes: 0514-0524Z: scattered weak AP remaining -----> corrected 1357-1436Z: scattered weak AP remaining -----> corrected ********************************************************************************************** 19 Jan 98: Light precip NW of radar around midday. A band of more moderate precipitation moves in from the NW and tracks across the scope by the end of the day. However, the band weakens with time. Data processed: 0000-2355 Z Satellite coincidence: 0440Z, 0616Z, 0753Z, 0930Z QC notes: 1245-1410Z: weak AP remaining SW of radar while precip N of radar has holes and gaps made by algorithm 2B !!FLAG!! -----> missing precip (not much of it) put back in field. Weak AP reduced but not entirely removed, hence the flag 1415-1435Z: moderate-to-intense AP SW of radar with precip present N of radar 2B !!FLAG!! -----> all AP is believed to be beyond 150 km. VOS 1415Z does contain a moderate AP speck within this range and it is this VOS for which the minor flag was raised. Even though all AP in VOS 1435Z is beyond 150 km, moved it to bad_files_not_in_1C.HDF directory mainly for aesthetic purposes. 1501-1611Z: holes and gaps in light precipitation NE of radar -----> corrected 1656-1730Z: weak rain core removed W of radar -----> corrected 1820-2355Z: holes and gaps in light precipitation -----> corrected ********************************************************************************************* 20 Jan 98: Only precipitation on this day is in the form of a thin band weak to moderate (barely) showers which moves off the coast and is completely gone by 05Z. Some showers skirt the outer fringes later in the day but no other significant precip. Data processed: 0000-2358 Z Satellite coincidence: 0327Z, 0504Z, 0817Z, 0954Z QC notes: 0000-0050Z: holes and gaps in light precipitation -----> corrected 0100-0150Z: moderate AP speck turns into intense, horrendous AP with the kicker being that a band of showers is also present 2A !!FLAG!! -----> vastly improved but some intense AP remains in most VOS's, particularly those at the end of this time period in question. Could not remove any more AP without removing moderate precip, thus false echo remains and is given a major flag. 1913-2230Z: holes and gaps in light precipitation -----> corrected ********************************************************************************************* 21 Jan 98: Widely scattered weak showers during the first half of the day become more numerous as the day wanes on, although reflectivities are still weak. Data processed: 0008-2358 Z Satellite coincidence: 0351Z, 0528Z, 0705Z, 0841Z QC notes: 0245-0552Z: holes and gaps in light precipitation -----> corrected 0947-2358Z: holes and gaps in light precipitation -----> corrected ********************************************************************************************* 22 Jan 98: Scattered showers throughout the day with two other common features: a convective cluster is present for most of the day to the south of the radar and moderate showers/weak convective cells a constant, east of the radar moving northward. Data processed: 0003-2356 Z Satellite coincidence: 0239Z, 0415Z, 0729Z, 0905Z QC notes: 0003-1520Z: holes and gaps in light precipitation -----> corrected 1700-2356Z: holes and gaps in light precipitation -----> corrected ******************************************************************************************** 23 Jan 98: A short-lived line of convective cells and scattered light showers early on give way to a large MCS which starts dumping copius amounts of rain over the region seen by the radar. Convective activity is quite prevalent and at times intense as the system moves across the scope. Data processed: 0001-1209 Z 1339-2136 Z 2327-2356 Z Satellite coincidence: 0126Z, 0302Z, 0616Z, 0752Z QC notes: 0001-1104Z: removal of light precipitation 1A,2A !!FLAG!! -----> all light precip was put back in the field but unfortunately the problem with very shallow precip reared its ugly head again. From 0453-0718Z, the precip moved close enough to the radar that the only way to keep in this incredibly shallow precip was to greatly reduce most parameters (including turning off H1 and Z0) This resulted in most clutter and AP near the radar to be re-introduced with nothing to do to fix it...hence the major flags 1154-1209Z: removal of light precipitation -----> corrected 1339-2356Z: 10 km ring of missing precip surrounding radar (Z2 high) 2A !!FLAG!! -----> hole of missing precip corrected. Flag due to weak to marginally moderate AP remaining embedded in light precip near radar from 2056-2136Z. Unfortunately, the light precip complicated things because the parameters had to be lightened ti bring that all back and this allowed the weak AP in this region to hold fast as well. At times it is difficult to discern whether a particular echo in the vicinity of the radar is true of false. However, since the area of false echo is small and the intensities weak, the flag is only minor. ********************************************************************************************* 24 Jan 98: Strong convection continues to move off the coast.Weak to moderate showers present for most of the time period with some isolated convection from time to time. Data processed: 0002-0623 Z 1249-2356 Z Satellite coincidence: 0149Z, 0640Z, 0816Z QC notes: 0002-0026Z: removal of precip immediately over radar (Z2 too high) 3B !!FLAG!! -----> precip removal corrected. However, flag exists due to some small AP echoes embedded in true precip in the immediate vicinity of the radar. Most disernible in VOS 0014Z, but may also be true in VOS's 0020 and 0026Z as well. Coverage is very small....hence the minor flag. 0205-0216Z: moderate AP sepck remaining near radar -----> corrected 0228-0303Z: removal of light precipitation -----> corrected 0309-0332Z: weak-to-moderate-to-intense AP remaining (presence of precip as well should make qc interesting) 3A- !!FLAG!! -----> for the most part, vastly improved but 2 VOS's still contain some AP. 0221-0227Z contain a moderate AP splotch (slightly larger than a speck....like comparing a baseball to a softball) which could not be removed without affecting the light precip further west. These splotches looked very much like real cells but looking back at the original DZ and VR images, considered AP because: (1)no discernible velocity signature other than zero velocity and (2) the "cell" looks to be originally part of radially oriented AP and was just plucked out of the larger AP structure by the algorithm. The flag is considered between major and minor because the coverage is rather small but the intensity is in the moderate category. 0513-0623Z: removal of light precipitation -----> corrected 1430-1500Z: weak AP embedded in light precipitation 2B !!FLAG!! -----> nothing can be done about embedded AP....luckily the AP is pretty tame in this case 1525-1624Z: removal of light precip near radar 2B -----> precip removal problem corrected but to do so, had to turn ZO off in addition to normal settings for precip removal and this resulted in most of the weak AP/clutter near the radar to remain....hence the flag 1639-1849Z: removal of light precip 2A,2B !!FLAG!! -----> precip removal problem corrected but in doing so, AP/clutter was also re-introduced. The major flag is for the beginning of this time period where more moderate clutter is present while towards the end of this period, the clutter is only in the weak category...hence the minor flag. 1649-1719Z: 10 km ring of missing precip surrounding radar (Z2 set too high) 2A !!FLAG!! -----> precip put back in but unfortunately, moderate AP/clutter is embedded in it....hence the major flag *********************************************************************************************** 25 Jan 98: No precipitation Data processed: 0001-1138 Z 1552-2352 Z Satellite coincidence: 0037Z, 0213Z, 0527Z, 0703Z QC notes: no problems ******************************************************************************************** 26 Jan 98: Widely scattered showers until roughly 15Z when more convection is present. These isolated convective cells fill in south of the radar forming convective clusters and a large, moderate rain shield by the end of the day. Data processed: 0002-2359 Z Satellite coincidence: 0101Z, 0414Z, 0551Z, 2348Z QC notes: 0951-1308Z: removal of light precipitation NE of radar 2B !!FLAG!! -----> light precip problem completely corrected but in doing so, have re-introduced scattered weak AP splotches and isolated moderate Ap specks. The AP could not be removed without removing light precip...hence the flag 1300-2359Z: removal of echo in upper tilt scans (need to lower Z3) -----> corrected 1421-1437Z: holes and gaps in light precipitation -----> corrected 1458-2028Z: holes and gaps in light precipitation -----> corrected 2104-2307Z: holes and gaps in light precipitation -----> corrected. In addition to normal light precip settings, also had to lower H3 to 1.0 km in order to reduce chunking light precip in next tilt up. H3=1.0 seems to have know effect on precip in lowest scan. 2312-2359Z: weak-to-moderate AP near radar as cells begin to form in this region 1B !!FLAG!! -----> could not remove AP without affecting light precip present. AP left in field. ********************************************************************************************* 27 Jan 98: Large shield of moderate precip continues to push off the coast to the south early on while some persistent, strong cells hold fast NE of the radar. Cells rapidly develop over and just east of the radar and fill in to form a line of intense convection. Stratiform soon shows itself with convection hanging on throughout the scope, but mainly to the east. A pretty interesting day with lots of precipitation. Data processed: 0004-2356 Z Satellite coincidence: 0125Z, 0439Z, 0615Z QC notes: 0004-1605Z: chunking out of precip in higher tilt scans (H3 is set too high) -----> corrected 1854-2026Z: 10 km hole of missing precip surrounding radar (Z2 is too high) -----> corrected 2122-2158Z: removal of light precip west of radar -----> corrected ********************************************************************************************* 28 Jan 98: Scattered weak showers early and streamers of weak showers move across scope after 16Z....that is the only precip on this day. Data processed: 0001-2354 Z Satellite Coincidence: 0012Z, 0149Z, 0326Z, 0503Z QC notes: 0011-0144Z: holes and gaps in light precipitation -----> corrected 0220-0342Z: holes and gaps in light precipitation -----> corrected 1542-2354Z: removal of precip in higher elevation scans -----> corrected 1622-2354Z: holes and gaps in light precipitation 2B !!FLAG!! -----> holes in precip completely fixed but since precip at times becomes very shallow, the following VOS's contain weak AP due to greater reduction of parameters (namely turning off Z0): 1750-1928Z, 2106-2127Z ********************************************************************************************** 29 Jan 98: Shield of weak, shallow precip continues to move off the coast, south of the radar (00-08Z). Some weak precipitation north of the radar late in the day and that is all the precip (if it truly is reaching the ground) for the day. Data processed: 0004-2353 Z Satellite coincidence: 0037Z, 0350Z, 0527Z QC notes: 0004-0756Z: removal of light precipitation 2A !!FLAG!! -----> holes in precip were completely corrected but unfortunately some moderate-to-intense AP specks reared their heads toward the end of this time preriod. From 0716-0756Z, these AP specks could not be removed without compromising the true echo and the flag is present for this reason. Incidentally, H3 = 1.0 km was still too high in that some chunking out of precip in the next tilt scan was still present. Reducing H3 further to 0.3 km did the trick....once again this weak, shallow precip is posing some problems. 0746-1520Z: scattered weak-to-moderate AP remaining 3B !!FLAG!! -----> The flag is for the following VOS's: 0805Z, 0825Z, 0835Z. These times contained a moderate speck of AP west of the radar which could not be removed without affecting the light precip to the south. After, 0845Z, there is either no precip or precip which is present is beyond 150 km. Therefore, as AP increases, it is not a worry because I can jack everything way up without fear of affecting precip....I usually set all the heights to 7 and all the reflectivities to 77...smaller values would definitely work but I use these to (a) be sure (b) as a signature that AP and not precip is the only thing present ********************************************************************************************** 30 Jan 98: Some light showers at the edges of the scope early on. More bands of light, shallow precip which seem to be becoming commonplace, move across the scope towards the end of the day (after 19Z) Data processed: 0003-1259 Z 1535-1630 Z 1802-2351 Z Satellite coincidence: 0238Z, 0414Z, 2212Z, 2348Z QC notes: 0101-0131Z: holes and gaps in light precipitation -----> corrected 0616-0705Z: weak-to-moderate AP remaining S of the radar (light precip is also present which may pose a problem) 2A !!FLAG!! -----> only a slight improvement in that a minority of the AP specks were successfully removed. Due to the present of light precip, the other AP specks (and there were several in some of the VOSs) could not be removed without affecting this light precip. THus the specks were left in and flagged as 2A (VOS 0636Z is shipped included in 1C.hdf). VOS 0705Z was moved to bad_files_not_in_1C.hdf directory 0745-0754Z: weak-to-moderate AP speck remaining S of radar (no precip) -----> corrected 1916-2351Z: holes and gaps in light, shallow precipitation 2B,1A !!FLAG!! -----> the holes in light precip was completely corrected. Now the bad news: From 1916-2054Z, some weak AP specks and splotches were re-introduced and could not be removed without affecting the light precip. From 2104-2351Z, the precip becomes very shallow and the only way to put all the true echo back in was to further reduce H1, H2, Z2, and Z3, along with turning off Z0 (set to -99). This causes more numerous weak AP (and some moderate AP) specks and splothes to return to the field...enough that it warrants a major flag. ********************************************************************************************** 31 Jan 98: Only precipitation in the form of bands of light, shallow showers early on. All showers dissipate by 09Z and there is nothing else for the rest of the day. Data processed: 0001-2350 Z Satellite coincidence: 0302Z, 0438Z, 2059Z QC notes: 0001-0832Z: holes and gaps in light precipitation 2A,1B !!FLAG!! -----> all holes in precip completely corrected. However, there are two distinct times where the precip becomes so shallow that parameters had to be tweaked way down to accomodate: 0021-0219Z time preiod of shallow precip now also contains a considerable amount of weak AP accompanied with some scattered moderate AP....the coverage of this AP is the reason for the 2A flag. 0446-0832Z time period of shallow precip has much less resulting weak AP hence the minor flag, although part of this time period is coincident with TRMM. In both cases, could not further reduce the AP without affecting the pesty, shallow precip 0942-1506Z: weak-to-moderate-to-intense AP, mainly to the WNW at first but scattered throughout the scope later in the period (the good news is that there is no precip) -----> corrected **********************************************************************************************