1999 KW4 Planning
Background
1999 KW4 is one of fewer than two dozen known Mercury-crossing
asteroids. Its orbit (a = 0.64 AU, e = 0.69, i = 39°) is unique among
the asteroids for its combination of high inclination and small
perihelion distance (q = 0.200 AU). The only known objects that have
both a smaller q and a larger inclination are comets 96P (Machholz 1)
and C/1998 J1 (SOHO). Perhaps this potentially hazardous asteroid is
an extinct comet nucleus.
It has been noted that ideal asteroid orbits for radar studies of
relativistic effects would have semimajor axis near 0.6 AU and
eccentricity slightly over 0.9. 1999 KW4 may be as useful in this
respect as 1566 Icarus (a,e,i = 1.1 AU, 0.83, 23°).
P. Pravec and L. Sarounova at Ondrejov (Czech Republic) obtained
photometry that suggests a period of a few hours and possibly a
complex asteroid. Although nothing more is known about this object's
physical properties other than its absolute visual magnitude (H =
16.7, implying an effective diameter of at least 1.4 km), the spring
2001 apparition is favorable for photometry and vis-IR spectroscopy,
so the rotation period and taxonomic class may become available soon.
The next 1999 KW4 radar opportunity this good is in 2036.
1999 KW4 passes deeply into the Goldstone detectability window and
then enters northern declinations at its 0.033-AU closest approach.
Our goals are to use Goldstone to refine the ephemerides (although
initial uncertainties are likely to be small) and to define the
object's basic properties (possibly developing a preliminary shape
model) and then to exploit the much greater echo strengths available
at Arecibo for imaging at ~15-m resolution, permitting construction of
a comparably detailed physical model. The asteroid crosses about 1/3
of the sky over the course of the proposed two-observatory experiment,
enhancing the likelihood that our orientational coverage will
establish the pole direction and will yield a very accurate shape
model.
During Goldstone tracks on May 26, 27, and 28, during overlap with the
Arecibo view periods, we will attempt S-band interferometry with
Arecibo transmitting and both Arecibo and Goldstone receiving
simultaneously. On May 27 we have the telescope from 0220-1350 but we
do not have transmit authorization.
Discovery
M.P.E.C. 1999-K28 Issued 1999 May 22, 16:56 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1999 KW4
Observations:
J99K04W* C1999 05 20.36553 21 03 02.55 +07 31 00.0 17.1 704
...
J99K04W C1999 05 22.46446 20 56 42.35 +11 40 24.6 658
Observer details:
046 Klet. Observers J. Ticha, M. Tichy. Measurer M. Tichy. 0.57-m f/5.2
reflector + CCD.
327 Peking Observatory, Xinglong Station. Observers J. Zhu, X. M. Teng. 0.6-m
Schmidt + CCD.
557 Ondrejov. Observer L. Sarounova. 0.65-m f/3.6 reflector + CCD.
620 Observatorio Astronomico de Mallorca. Observers A. Lopez, R. Pacheco.
0.30-m f/3.3 Schmidt-Cassegrain + CCD.
658 Dominion Astrophysical Observatory. Observer D. D. Balam. 1.82-m
reflector + CCD.
693 Catalina Station, Tucson. Observers C. W. Hergenrother, A. E. Gleason.
1.5-m reflector + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, F. Shelly,
M. Bezpalko, M. Elowitz. Measurers J. Stuart, H. Viggh, R. Sayer. 1.0-m
f/2.15 reflector + CCD.
Orbital elements:
1999 KW4 PHA 0.031A
Epoch 1999 May 2.0 TT = JDT 2451300.5 Williams
M 130.47690 (2000.0) P Q
n 1.91811710 Peri. 192.47339 +0.25925309 -0.77482290
a 0.6415334 Node 245.13480 +0.93171611 +0.35786177
e 0.6914228 Incl. 39.45584 +0.25434805 -0.52113763
P 0.51 H 16.6 G 0.15
From 33 observations 1999 May 20-22.
...
Gareth V. Williams (C) Copyright 1999 MPC M.P.E.C. 1999-K28
SNR Calculation
1999 KW4 (with assumed diameter = 1.4 km and period = 4 h)
Arecibo Goldstone
UTC Date RA Dec Dist. Max SNR Max SNR
yyyy mon day (h) (deg) (AU) /run /run
2001 May 21 22.3 -26 0.061 0 20
2001 May 22 21.8 -24 0.052 0 37
2001 May 23 21.1 -19 0.043 0 72
2001 May 24 20.3 -15 0.037 0 130
2001 May 25 19.2 -7 0.033 0 210
2001 May 26 18.3 1 0.032 2600 220
2001 May 27 17.2 10 0.035 2200 150
2001 May 28 16.3 17 0.041 1300 87
2001 May 29 15.6 21 0.050 700 40
Goldstone Track Assignments
TX windows
DOY Goldstone Arecibo
141 May 21 1405-1630
142 May 22 1145-1600
143 May 23 1015-1355
144 May 24 0855-1535
145 May 25 0830-1445
146 May 26 0520-1400 0550-0709
147 May 27 S-band rcv 0408-0632 <== No transmitting at Goldstone on this day
148 May 28 0235-0655 0302-0543
149 May 29 0535-1030 0216-0500 GOLDSTONE S-BAND RECEIVE CANCELLED
======================================================================================
1999 KW4 TRANSMIT WINDOWS
Note that on May 27 Goldstone will receive but not transmit.
This is indicated below with "g"
DOY 141 142 143 144 145 146 147 148 149
UTC AST PDT May 21 22 23 24 25 26 27 28 29
Mon
0200 22:00 7pm Sun eve
15 eve A
30 G A
45 G A
0300 23:00 8pm GA A
15 GA A
30 GA A
45 Sat GA A
0400 00:00 9pm eve GA A
15 Ag GA A
30 Ag GA A
45 Fri Ag GA A
0500 01:00 10pm eve Ag GA A
15 G Ag GA
30 G Ag GA G
45 GA Ag GA G
0600 02:00 11pm GA Ag G G
15 GA Ag G G
30 GA Ag G G
45 GA Ag G G
0700 03:00 12mid GA G G
15 GA G
30 G G
45 G G
0800 04:00 1am Fri G G
15 morn G G
30 Thur G G G
45 morn G G G
0900 05:00 2am G G G G
15 G G G G
30 G G G G
45 Wed G G G G
1000 06:00 3am morn G G G G
15 G G G G G
30 G G G G G
45 G G G G
1100 07:00 4am G G G G
15 Tues G G G G
30 morn G G G G
45 G G G G G
1200 08:00 5am G G G G G
15 G G G G G
30 G G G G G
45 G G G G G
1300 09:00 6am G G G G G
15 G G G G G
30 Mon G G G G G
45 morn G G G G G
1400 10:00 7am G G G G G G
15 G G G G
30 G G G G
45 G G G G
1500 11:00 8am G G G
15 G G G
30 G G G
45 G G
1600 12:00 9am G G
DOY 141 142 143 144 145 146 147 148 149
UTC AST PDT May 21 22 23 24 25 26 27 28 29
======================================================================================
Uncertainties (from Jon Giorgini)
Date: Wed, 25 Apr 2001 15:59:28 -0700 (PDT)
With 500 optical measurements spanning 1999-May-20 to
2000-Jul-5, 1999 KW4 solution #48 1-sigma X-band uncertainties
are shown below:
DATE Pointing X-band Dop Delay
(") Hz (sec)
----------------- --------- ---------- ----------
20-MAY-2001 00:00 3.469 3.449 0.000734
21-MAY-2001 00:00 3.883 3.246 0.000714
22-MAY-2001 00:00 4.384 2.966 0.000712
23-MAY-2001 00:00 4.928 2.596 0.000740
24-MAY-2001 00:00 5.381 2.215 0.000807
25-MAY-2001 00:00 5.419 2.252 0.000901
26-MAY-2001 00:00 4.921 3.091 0.000963
------------------------------------------------------
- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Date:Tue, 15 May 2001 12:47:27 -0700 (PDT)
New data was reported. With 505 observations spanning
1999-May-20 to 2001-May-14, 1999 KW4 soln#50 was computed.
1 sigma X-band uncertainties are below.
DATE Pointing X-band Dop Delay
(") Hz (sec)
----------------- --------- ---------- ----------
20-MAY-2001 00:00 1.736 2.387 0.000540
21-MAY-2001 00:00 1.951 2.282 0.000519
22-MAY-2001 00:00 2.221 2.126 0.000502
23-MAY-2001 00:00 2.542 1.892 0.000490
24-MAY-2001 00:00 2.886 1.568 0.000486
25-MAY-2001 00:00 3.146 1.297 0.000488
26-MAY-2001 00:00 3.176 1.525 0.000480
Divide X-band Doppler uncertainty column by 3.6 to
get S-band uncertainties.
Doppler/delay/pointing predicts have been established
at both Goldstone and Arecibo.
Solution residual statistics:
Type # pts Mean Std dev. RMS
---- ----- ------------ ------------ ------------
1. opt RA 505 0.32238E-01 0.56870E+00 0.56905E+00
2. opt DEC 505 0.15459E-01 0.49296E+00 0.49271E+00
- - - - - - - - - - - - - - - - - - - - - - - - - -
For the 1999 KW4 solution #52 you computed, with
510 observations spanning May 20, 1999 to May 19, 2001,
plus the one delay on May 21, 1-sigma X-band uncertainties
are shown below:
DATE Pointing X-band Dop Delay
(") Hz (sec)
----------------- --------- ---------- ----------
20-MAY-2001 00:00 1.201 2.223 0.000530
21-MAY-2001 00:00 1.350 2.144 0.000510
22-MAY-2001 00:00 1.527 0.958 0.000032
23-MAY-2001 00:00 1.747 0.783 0.000074
24-MAY-2001 00:00 1.950 0.598 0.000135
25-MAY-2001 00:00 1.998 0.648 0.000205
26-MAY-2001 00:00 1.764 1.063 0.000262
27-MAY-2001 00:00 1.457 1.487 0.000282
28-MAY-2001 00:00 1.269 1.732 0.000269
29-MAY-2001 00:00 1.124 1.836 0.000245
30-MAY-2001 00:00 0.989 1.871 0.000223
Close approach predict extent is now valid from approximately
1162 to 2964. The nominal trajectory has a possible 1 lunar
distance close-approach to the Earth-Moon system in 2929, at
a fairly high relative velocity.
- - - - - - - - - - - - - - - - - - - - - - - - - -
For the 1999 KW4 sol#54 you computed, with
510 optical observations May 20, 1999 to May 19, 2001
plus two delay, 1 sigma X-band uncertainties are
as follows:
DATE Pointing X-band Dop Delay
(") Hz (sec)
----------------- --------- ---------- ----------
23-MAY-2001 00:00 0.397 0.247 0.000004
24-MAY-2001 00:00 0.349 0.179 0.000012
25-MAY-2001 00:00 0.385 0.145 0.000023
26-MAY-2001 00:00 0.376 0.205 0.000034
27-MAY-2001 00:00 0.326 0.302 0.000040
28-MAY-2001 00:00 0.272 0.368 0.000043
29-MAY-2001 00:00 0.227 0.401 0.000044
30-MAY-2001 00:00 0.193 0.417 0.000045
- - - - - - - - - - - - - - - - - - - - - - - - - -
Based on the solution (#56) Lance produced, with 519
optical measurements (May 20, 1999 to May 23, 1999), and
3 radar delay, 1-sigma X-band uncertainties are:
DATE Pointing X-band Dop Delay
(") Hz (sec)
----------------- --------- ---------- ----------
23-MAY-2001 00:00 0.397 0.247 0.000004
24-MAY-2001 00:00 0.283 0.179 0.000003
25-MAY-2001 00:00 0.329 0.136 0.000008
26-MAY-2001 00:00 0.346 0.167 0.000015
27-MAY-2001 00:00 0.316 0.249 0.000023
28-MAY-2001 00:00 0.265 0.310 0.000029
29-MAY-2001 00:00 0.219 0.343 0.000034
30-MAY-2001 00:00 0.183 0.360 0.000038
- - - - - - - - - - - - - - - - - - - - - - - - - -
2001 May 26
-----------
With the new delay from Lance and new optical data covering
the span May 20, 1999 to May 25, 2001 (539 obs), solution #60
was computed and found to have the uncertainties shown below.
DATE Pointing X-band Dop Delay
(") Hz (sec)
----------------- --------- ---------- ----------
20-MAY-2001 00:00 0.400 0.741 0.000177
21-MAY-2001 00:00 0.450 0.715 0.000170
22-MAY-2001 00:00 0.509 0.319 0.000011
23-MAY-2001 00:00 0.397 0.247 0.000004
24-MAY-2001 00:00 0.283 0.179 0.000003
25-MAY-2001 00:00 0.290 0.127 0.000008
26-MAY-2001 00:00 0.223 0.156 0.000013
27-MAY-2001 00:00 0.183 0.207 0.000003
28-MAY-2001 00:00 0.159 0.246 0.000007
29-MAY-2001 00:00 0.134 0.266 0.000010
30-MAY-2001 00:00 0.113 0.275 0.000014
Setups
This object's bandwidth could be as large as several hundred Hz.
The ephemeris will be good to a few Hz.
Starting CW setup on the first track:TX polarization
TX polarization RCP
RCV polarization LCP
Frequencies: 2
Dwell: 25 seconds
Bandwidth: 4000 Hz
Sampling interval: 2500 x 0.1 usec
VME FFT for PSD files: 1024 for 3.90625-Hz resolution
Possible ranging setups:
---------------------------------------------------------------------------
127 x 64 10-usec single sample
baud 10 usec
code 127
gates 127
FFT 64
CLT 11
ncoh 2
bandwidth 394 Hz
resolution 6.15 Hz
TXOFF TBD
incoh sums 64 => 10.4 sec/record
---------------------------------------------------------------------------
127 x 64 11-usec single sample.
baud 11 usec
code 127
gates 127
PRP 1397
FFT 64
CLT 11
ncoh 2
bandwidth 357.9 Hz
resolution 5.59 Hz
TXOFF TBD
-------------------------------------------------------------------------
0.125-usec ranging
setup JX1XS001
baud 0.125 usec
code 127
gates 127
FFT 64
ncoh 1968
bandwidth 32.008 Hz
resolution 0.5001 Hz
TXOFF 6 Hz = 12 cells, => cell 44
incoh sums 4 looks=> 8 sec/record => expect records per run ~ RTT/8
CLT gate 34.8
_____________________________________________________________________
POSSIBLE RANGING SETUPS: (code=127, FFT=64, single-pol'n)
These are from JX, w/ max-band (min-acc) options from Ray Jurgens.
Currently configured for 5-sec records.
_______________________________________________________________________
Setup Baud RP 1-acc 1-acc
usec m usec band res acc band res
_______________________________________________________________________
JX1XS110 11.000 1650 1397.0 715.8 11.2 2 358 5.6
JX1XS070 7.000 1050 889.0 1124.9 17.6 3 375 5.9
JX1XS020 2.000 300 254.0 3937.0 61.5 12 328 5.1
4 984 15.4
JX1XS010 1.000 150 127.0 7874.0 123.0 41 192 3.0
8 984 15.4
JX1XS005 0.500 75 63.5 15748.0 246.1 123 128 2.0
15 1050 16.4
JX1XS002 0.250 37.5 31.75 31496.1 492.1 492 64 1.0
30 1050 16.4
JX1XS001 0.125 18.75 15.875 62992.1 984.3 1970 32 0.5
60 1050 16.4
Instructions
NOTE: Data should be moved to the appropriate subdirectories in
intruder:/d1/1999kw4/raw/
1999kw4 POINTING:
For these observations, we need the following files:
EPH.OUT.s52
PRDX.OUT.s52
PUNCH.OUT.s52
These files were created in: intruder:/export/data2/osod/ops/1999kw4
have been copied to: intruder:/d1/1999kw4/support/
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2001 05 28 148 020000 245.7959 15.9547 A 40.7 50
2001 05 28 148 030000 245.2810 16.1897
2001 05 28 148 040000 244.7690 16.4199
2001 05 28 148 050000 244.2604 16.6449 A 0.0058 0.0026 41.6
2001 05 28 148 060000 243.7559 16.8647
2001 05 28 148 070000 243.2562 17.0791
2001 05 28 148 080000 242.7623 17.2882 A 42.6
2001 05 29 149 020000 235.1523 20.3768 A 48.8 50
2001 05 29 149 030000 234.7736 20.5203
2001 05 29 149 040000 234.3971 20.6604 A 0.0051 0.0019 49.6
2001 05 29 149 050000 234.0235 20.7969 B 49.9
2001 05 29 149 060000 233.6534 20.9297 A 50.3
2001 05 29 149 070000 233.2874 21.0587
2001 05 29 149 080000 232.9264 21.1841 B 0.0051 0.0018 51.1
2001 05 29 149 090000 232.5710 21.3059
2001 05 29 149 100000 232.2219 21.4243
2001 05 29 149 110000 231.8795 21.5396 B 52.2
=============================================================================
Goldstone PRDX.OUT.s60
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2001 MAY 28 02:20 40.8216406438 -696014.710 278.1810 16.0337 245.624 15.756
2001 MAY 28 02:30 40.8704838827 -697652.061 280.7737 16.0730 245.538 17.870
2001 MAY 28 02:40 40.9194432181 -699327.149 283.3663 16.1121 245.452 19.989
2001 MAY 28 02:50 40.9685212745 -701039.531 285.9589 16.1511 245.366 22.114
2001 MAY 28 03:00 41.0177206482 -702788.673 288.5513 16.1899 245.281 24.242
2001 MAY 28 03:10 41.0670438973 -704573.958 291.1437 16.2286 245.195 26.373
2001 MAY 28 03:20 41.1164935284 -706394.683 293.7360 16.2672 245.110 28.505
2001 MAY 28 03:30 41.1660720014 -708250.063 296.3283 16.3056 245.024 30.638
2001 MAY 28 03:40 41.2157817129 -710139.230 298.9204 16.3439 244.939 32.769
2001 MAY 28 03:50 41.2656249985 -712061.238 301.5124 16.3820 244.854 34.898
2001 MAY 28 04:00 41.3156041273 -714015.064 304.1044 16.4200 244.769 37.022
2001 MAY 28 04:10 41.3657212890 -715999.607 306.6963 16.4579 244.684 39.140
2001 MAY 28 04:20 41.4159785961 -718013.697 309.2880 16.4956 244.599 41.249
2001 MAY 28 04:30 41.4663780765 -720056.091 311.8797 16.5332 244.514 43.349
2001 MAY 28 04:40 41.5169216714 -722125.478 314.4713 16.5706 244.429 45.436
2001 MAY 28 04:50 41.5676112223 -724220.485 317.0627 16.6079 244.345 47.506
2001 MAY 28 05:00 41.6184484752 -726339.672 319.6541 16.6451 244.260 49.558
2001 MAY 28 05:10 41.6694350727 -728481.545 322.2453 16.6821 244.176 51.586
2001 MAY 28 05:20 41.7205725510 -730644.550 324.8364 16.7189 244.092 53.586
2001 MAY 28 05:30 41.7718623382 -732827.084 327.4275 16.7556 244.007 55.553
2001 MAY 28 05:40 41.8233057400 -735027.492 330.0183 16.7922 243.923 57.478
2001 MAY 28 05:50 41.8749039554 -737244.073 332.6091 16.8286 243.839 59.355
2001 MAY 28 06:00 41.9266580519 -739475.086 335.1997 16.8648 243.756 61.171
2001 MAY 28 06:10 41.9785689842 -741718.750 337.7902 16.9010 243.672 62.916
2001 MAY 28 06:20 42.0306375730 -743973.250 340.3805 16.9369 243.588 64.572
2001 MAY 28 06:30 42.0828645107 -746236.737 342.9708 16.9727 243.505 66.122
2001 MAY 28 06:40 42.1352503670 -748507.340 345.5608 17.0084 243.422 67.543
2001 MAY 28 06:50 42.1877955716 -750783.159 348.1507 17.0439 243.339 68.808
2001 MAY 28 07:00 42.2405004231 -753062.279 350.7405 17.0793 243.256 69.888
===================================================================================================
MASTERLOG
===================================================================================================
RCV
file setup runs start -stop osod OFFSET TX Poln Ptx
---------------------------------------------------------------------------------------------------
May 21 (DOY 141)
----------------
PSD01141.1999kw4, VOLT01141.1999kw4
CW 4000 Hz 1024 FFT 5 140744-141659 50 none RCP
kw414103 10 us x 5.59 Hz 4 142851-143623 50 +50 RCP
kw414106 11 us x 6.15 Hz 2 144656-145002 50 +50 RCP
kw414109 1 us x 3.0 Hz 23 150144-154932 50 +30 RCP
May 22 (DOY 142)
----------------
kw414203 10 us x 6.15 Hz 1 121544-121636 52 +50 RCP
kw414206 11 us x 5.59 Hz 2 125114-125352 52 +50
kw414209 0.5 us x 2.0 Hz 2 130640-130916 52 +30
kw414210 0.5 us x 2.0 Hz 20 131320-134841 52 +30 Hz, +30 gates
kw414211 0.5 us x 2.0 Hz 51 135304-152144 52 +30 Hz, +30 gates
kw414212 0.5 us x 2.0 Hz 19 152605-155957 52 +30 Hz, +30 gates
May 23 (DOY 143)
----------------
kw414303 0.25 us x 1.0 Hz 255x256 8 101828-10320? 54 +30 Hz 437
kw414304 0.25 us x 1.0 Hz 255x256 49 103323-114849 54 +30 Hz, +50 gates 446
kw414305 0.25 us x 1.0 Hz 255x256 48 115200-130552 54 +30 Hz, +50 gates 455
kw414306 0.25 us x 1.0 Hz 255x256 20 131108-134123 54 +30 Hz, +50 gates 450
kw414307 0.25 us x 1.0 Hz 255x256 5 134727-135429 54 +30 Hz, +50 gates 450
May 24 (DOY 144)
----------------
kw414403 0.25 us x 1.0 Hz 255x256 37 085550-094344 56 +30 Hz 433
kw414404 0.25 us x 1.0 Hz 255x256 48 094748-105020 56 +30 Hz 450
kw414405 0.25 us x 1.0 Hz 255x256 38 105231-114010 56 +30 Hz 442
kw414406 0.25 us x 1.0 Hz 255x256 12 142632-144114 56 +30 Hz 443
kw414407 0.25 us x 1.0 Hz 255x256 38 144929-153512 56 +30 Hz 443
May 25 (DOY 145)
----------------
kw414503 0.125 us x 1.0 Hz 255x256 18 083816-085852 56 +40 Hz 10 sec records
kw414504 0.125 us x 1.0 Hz 255x256 48 090122-095716 56 +40 Hz 5 sec records
kw414505 0.125 us x 1.0 Hz 255x256 33 095933-103826 56 +40 Hz 5 sec records
kw414506 0.125 us x 1.0 Hz 255x256 21 104148-110636 56 +40 Hz 5 sec records
kw414507 0.125 us x 1.0 Hz 255x256 3 115539-115828 56 +40 Hz 15 sec records
kw414508 0.125 us x 1.0 Hz 255x256 48 120153-125815 56 +40 Hz 13 sec records
kw414509 0.125 us x 1.0 Hz 255x256 48 130107-135722 56 +40 Hz 13 sec records
kw414510 0.125 us x 1.0 Hz 255x256 15 142832-144529 56 +40 Hz 13 sec records
May 26 (DOY 146)
----------------
kw414603 0.125 us x 1.0 Hz 255x256 13 052008-053530 56 +40 Hz
kw414606 1.0 us x 3.0 Hz 127x 64 8 074817-075710 56 +40 Hz
kw414607 0.125 us x 1.0 Hz 255x256 32 080849-084704 56 +40 Hz
kw414608 0.125 us x 1.0 Hz 255x256 17 090125-092111 58 +40 Hz
kw414609 0.125 us x 1.0 Hz 255x256 45 092403-101742 58 +40 Hz,+20 gates
kw414610 0.125 us x 1.0 Hz 255x256 45 102057-111423 58 +40 Hz,+20 gates
kw414611 0.125 us x 1.0 Hz 255x256 6 121310-121931 58 +40 Hz,+30 gates
kw414612 0.125 us x 1.0 Hz 255x256 53 122825-133107 58 +40 Hz,+30 gates
kw414613 0.125 us x 1.0 Hz 255x256 21 133517-135939 58 +40 Hz,+30 gates
May 28 (DOY 148)
----------------
kw414803 0.25 us x 1.0 Hz 255x256 11 023907-025403 60 +40 Hz bad pointing
kw414804 0.25 us x 1.0 Hz 255x256 12 062047-063754 60 +40 Hz good pointing, VAX problem
kw414805 0.25 us x 1.0 Hz 255x256 10 064128-065503 60 +40 Hz good pointing, VAX OK
May 29 (DOY 149)
----------------
PSD01149RCP.1999kw4, VOLT01149RCP.1999kw4
4 kHz, 1024 FFT 5 044918-045703 60 none RCP
PSD01149LCP.1999kw4, VOLT01149LCP.1999kw4
4 kHz, 1024 FFT 5 045955-050654 60 none LCP
kw414903 1.0 us x 3.0 Hz 127x64 7 052031-053212 60 +40 Hz
kw414906 0.5 us x 2.0 Hz 127x64 21 054237-062210 60 +30 Hz
kw414907 0.5 us x 2.0 Hz 127x64 48 062940-075706 60 +30 Hz
kw414908 0.5 us x 2.0 Hz 127x64 48 080122-092650 60 +30 Hz bad pointing
kw414909 0.5 us x 2.0 Hz 127x64 34 093011-103005 60 +30 Hz good pointing
===================================================================================================
ASTROMETRY
==========
2001 05 21 14:40:00 R 60.7251762 10.0 8560.D6 -14 Benner, L.A.M.
Corr'n of -272.5 us to soln 50 from 10 and 11 us ranging.
2001 05 22 14:50:00 R 51.0844684 2.0 8560.D6 -14 Benner, L.A.M.
Corrn of +0.5 us to soln 52 from 10, 11, & 0.5 us when the TE of the primary
& 2ndary align in range. Uncertainty is ~2/3 of primary's vis rng extent
2001 05 23 10:20:00 R 44.08686953 1.5 8560.D6 -14 Benner, L.A.M.
Corr'n of -6.25 us to soln 54 from 0.25 us imaging using TE of primary
2001 05 26 07:50:00 R 32.496018 1.0 8560.D6 -14 Benner, L.A.M.
Corr'n of -17 us to soln 56 from 1.0 us imaging. TEs of primary
and secondary are at the same range gate (123). CLT = gate 13.
2001 05 29 05:30:00 R 50.119490 4.0 8560.D6 -14 Benner, L.A.M.
Corr'n of -30 us to soln 60 from 1.0 us ranging. COM=LE+1 gate inside primary
& uncert = primary's vis rng extent. TE sep'ns = 1.2 km w/secondary in front.
===================================================================================================
Dr. Lance A. M. Benner | PHONE: (818) 354-7412
300-233 | FAX: (818) 354-9476
Jet Propulsion Laboratory | email: lance@reason.jpl.nasa.gov
Pasadena, CA 91109-8099
Asteroid Radar Astronomy