April 4, 2007 TO: igscb@igscb.jpl.nasa.gov FROM: NGA/SNG Global Positioning System Division SUBJECT: IGS New Site Proposal The National Geospatial-Intelligence agency operates the NGA GPS Monitor Station Network consisting of 11 operational GPS Monitor Stations. NGA currently contributes data from the station at Manama, Bahrain (BAHR), to IGS on a daily basis. All stations have the same configuration and equipment including Ashtech Z(Y)-12 receivers, Agilent (formerly HP) 5071A Cesium clocks, and collect meteorological data. The following responds to questions listed on the IGS New Site Checklist. 1.Where is the station located? The stations and their domes numbers are: Code Pt Domes T Station Description Longitude Latitude Height AUST A 50109S001 P SALISBURY,AUSTRALIA 138 38 50.4 -34 43 44.4 38.2 ARGN A 41505S007 P BUENOS AIRES,ARGENTINA 301 28 50.5 -34 34 25.3 48.8 ENGL A 13235S001 P HERMITAGE,UNITED KING 358 42 58.0 51 27 13.5 163.1 BAHR A 24901M002 P MANAMA, BAHRAIN 50 36 29.3 26 12 32.9 -13.9 ECUA A 42003S003 P QUITO,ECUADOR 281 30 23.0 -0 12 54.6 2922.6 WASH A 40451S005 P WASHINGTON DC, USA 282 56 01.3 38 55 14.0 57.9 ALAS A 49805S001 P EIELSON AFB, ALASKA 212 53 13.3 64 41 16.6 176.6 NEWZ A 50208S003 P WELLINGTON,NEW ZEALAND 174 46 43.3 -41 16 21.5 46.9 SAFR A 30310S001 P PRETORIA, S.AFRICA 28 13 26.5 -25 44 46.8 1416.4 SKOR A 23904S001 P OSAN AB, S.KOREA 127 01 26.5 37 04 39.2 48.9 TAHT A 92201M013 P PAPEETE, TAHITI 210 23 37.7 -17 34 37.3 99.9 2. Is the station currently operating, or planned? If planned, when is the projected date it will become operational? All of the stations are currently operating. 3. What agencies are responsible for installing, managing, operating, and maintaining the station? The National Geospatial-Intelligence Agency (NGA) has complete responsibility for all of the listed stations. 4. What is the expected operational lifetime of the station? How secure is the funding? Operational Lifetime is indefinite. The above stations comprise the NGA GPS Monitor Station Network. Funding is in place and there is no scheduled end date. The network is maintained through lifecycle replacements. 5. Will the station replace an existing IGS station? If so, what is the scheduled date of decommissioning? Does the new station offer more capability than the old one? None of these stations are intended to replace any existing IGS station. 6. Does/will the station meet all of the strictly required IGS site guidelines? Each station meets all of the IGS site guidelines. The stations are configured the same as BAHR which is one station in the NGA GPS Monitor Station Network and also included in the IGS network. 7. What is the data delivery schedule? The data delivery schedule is: Daily transmission of 30 sec RINEX observation files along with meteorological data and navigation messages. 8. Can you set the receiver for "all in view" tracking (including tracking of satellites set unhealthy)? The receivers are set for "all in view" and track unhealthy satellites. 9. Are there currently operating IGS stations within 1000km? Approximately how many? Does this site offer any capabilities the others do not? Specific information for each site is listed below. Some NGA sites will offer higher standard equipment that other sites in their region, but others will duplicate what is currently available. There is an advantage to having all of the NGA sites in that each is configured identically with a precise timing reference and meteorological sensors, with redundant components and with monitoring to ensure continuous operations. The NGA sites are distributed worldwide and would offer the capability to analyze anomalies from multiple sites with identical configurations. IGS stations within 1000Km of proposed stations 85402 Australia: cedu, mobs, park, str1, tidb, str2 The NGA site would add more high accuracy redundancy. 85403 Argentina: cfag (dormant), cord (dormant), lpgs Only one IGS station is operational at this time. The NGA site would add a second site to this area. 85404 United Kingdom: brst (dormant), morp, lroc, npld, hert, tlse, opmt, dlft, brus, kosg, wsrt, titz, ieng, zimm, hueg, obez, ffmj, ptbb, leij, pots, warn There are numerous IGS sites with high standard equipment. An addition of the NGA site would be to include all the NGA sites. 85406 Ecuador: bogt, riop Both IGS sites have internal frequency standards. The NGA site has a Cesium clock. 85407 USNO: vald, algo, nrc1, cags, wes2, barh, godz, nrl1, hnpt NGA’s site is referenced to the USNO master clock ensemble. 85410 Alaska: fair, whit, invk, tukt The NGA site would give a second station in this region with a precise clock reference. 85411 New Zealand: auck, ous2, chat Only the OUS2 station has an external clock – Rb. The NGA site would add a second site in the region with a precise frequency standard. 85412 South Africa: hrao (dormant), rbay The NGA site is referenced to a Cs clock whereas the rbay site is reference to an internal oscillator. 85413 South Korea: bjfs, usud, shao, chan, suwn, daej, aira, gmsd There are several IGS sites with high standard equipment. An addition of the NGA site would be to include all the NGA sites. 85414 Tahiti: thti The NGA site would yield a second station in the region which also has a precise clock reference. 10. What IGS product or project will this site benefit, based on its location, instrumentation, and latency? The NGA GPS Monitor Stations are of high quality with identical configuration. They are highly dependable and are funded indefinitely. They include Ashtech Z(Y)-12 receivers, Agilent (formerly HP) 5071A Cesium clocks, and collect meteorological data. All stations have dual redundancy. All stations are being reviewed for monumentation. As a group these stations will improve accuracy of the following overall products - Final GPS Satellite Ephemerides, Final Earth Rotation Parameters, Final Atmospheric parameters. In some locations (identified in question 9), these stations can provide additional monitoring of the satellites in areas where few monitor stations are available. 11. Is this station intended to tie a national datum to the ITRF? These stations (including BAHR) are a large part of the foundation of the World Geodetic System 1984 (WGS 84) which NGA maintains. By design, WGS 84 is compatible with ITRF within 1 cm per component when plate tectonic motion is accounted for. 12. Is there a web page associated with this site (please specify)? If not, please include a site photo or two with this application. There is no webpage that lists each site. There is a main webpage where users can obtain NGA GPS products. It is earth-info.nga.mil/GandG/sathtml/index.html 13. Is data available on a public server (please specify)? The 30-sec rinex data is not posted on the NGA website. Derived products, such as the GPS precise ephemeris(referenced to both antenna phase center and center of mass), is posted daily on the NGA website. earth-info.nga.mil/GandG/sathtml/index.html 14. Please complete and include a draft site log for each monitoring station. (http://igscb.jpl.nasa.gov/igscb/station/general/blank.log) according to the instructions (http://igscb.jpl.nasa.gov/igscb/station/general/sitelog_instr.txt). Submitted as an attachment. IGS Station within 1000Kms of existing NGA Stations Argentina: cfag_20061220 cord_20050310l pgs_20060811 Australia: cedu_20060717 mobs_20060124 park_20060101 str1_20050530 str2_2005071 tidb_200601113 Ecuador: bogt_20050720 riop_20061019 New Zealand: auck_20051108 chat_20051108 ous2_20060827 South Africa: hrao_20060223 rbay_20020812 South Korea: aira_20060112 bjfs_20031111 chan_20041121 daej_20050502 gmsd_20040406 shao_20050208 suwn_20050128 usud_20060209 Tahiti: thti_20060412 United Kingdom: brst_20050131 brus_20050425 dlft_20060713 ffmj_20061204 hert_20030317 hueg_20070223 ieng_20070322 kosg_20021211 leij_20061204 lroc_20050316 morp_20050615 npld_20061203 obe2_20030414 opmt_20041125 pots_20060907 ptbb_20061116 titz_2006071 0tlse_20060410 warn_20060329 wsrt_20050412 zimm_20060222 USNO: algo_20061128 barh_20060801 cags_20051206 godz_20030418 hnpt_20060801 nrc1_20050419 nrl1_20050705 vald_20060630 wes2_20021017 Alaska: fair_20051220 invk_20070307 tukt_20050808 whit_20030612