February 25, 1994 SPX-484 SPACEWARN Activities A publication of NASA NSSDC/WDC-A-R&S on behalf of IUWDS/COSPAR (All information in this publication was received between January 25, 1994, and February 24, 1994.) A. List of New International Designations and Launch Dates. (USSPACECOM Catalog numbers are in parentheses.) 1994-013A (23016) GALAXY 1R Feb 19 -012A (23010) RADUGA 31 Feb 18 -011F (23004) COSMOS 2273 Feb 12 -011E (23003) COSMOS 2272 Feb 12 -011D (23002) COSMOS 2271 Feb 12 -011C (23001) COSMOS 2270 Feb 12 -011B (23000) COSMOS 2269 Feb 12 -011A (22999) COSMOS 2268 Feb 12 -010C (23009) SJ 4-2 Feb 08 -010A (22996) SJ 4 Feb 08 -009A (22988) USA 99 Feb 07 -008A (22981) RADUGA 1-3 Feb 05 -007B (22979) VEP Feb 03 -007A (22978) OREX Feb 03 -006H (22998) BREMSAT Feb 03 -006G (22995) ODERACS F Feb 03 -006F (22994) ODERACS E Feb 03 -006E (22993) ODERACS D Feb 03 -006D (22992) ODERACS C Feb 03 -006C (22991) ODERACS B Feb 03 -006B (22990) ODERACS A Feb 03 -006A (22977) STS 60 Feb 03 -005A (22975) PROGRESS M-21 Jan 28 -004A (22973) DSPSE Jan 25 -003B (22970) TUBSAT Jan 25 -003A (22969) METEOR 3 Jan 25 B. Text of Launch Announcements. 1994-013A GALAXY 1R, a U.S.A. geostationary spacecraft, was launched by a Delta 2 rocket from Cape Canaveral. It carried 24 C-band transponders and will replace the aging GALAXY 1, which is expected to become inoperative in April 1994. 1994-012A RADUGA 31, a Russian near-geostationary spacecraft, was launched from Baykonur cosmodrome by a Proton-K rocket at 07:56 UT. It carried six channels of telephone/telegraph relays. It will be moved to the designated parking longitude of 45 deg (E) from the initial 90 deg (E). Initial period is 24.55 min, and inclination is 1.5 deg. 1994-011F, COSMOS 2273, 2272, 2271, 2270, 2269, 2268, a fleet of -011E,-011D, six Russian spacecraft, were launched from Plesetsk cosmodrome -011C,-011B, by a Cyclone 3 booster at 09:54 UT into near-circular -011A orbits. Initial orbital parameters of all of them are approximately period 114.13 min, altitude 1,416 km, and inclination 82.57 deg. 1994-010C SJ 4-2, a PRC "simulated satellite," was launched into geostationary orbit by a Long March 3-A booster from Xichang launch site in southwestern PRC. 1994-010A SJ 4 (also known as Shijian 4 and Practice 4), a PRC science payload spacecraft, was launched by a Long March 3-A booster from Xichang site into a near-geostationary orbit. It carried six instruments for measuring particle fluxes and spacecraft electric potential. 1994-009A USA 99, the first of the six Milstar geostationary communication spacecraft, was launched from Cape Canaveral AFS by a Titan 4 rocket. 1994-008A RADUGA 1-3, a Russian near-geostationary communications spacecraft, was launched by a Proton-K booster from Baykonur cosmodrome. It carried several channels for telephone/telegraph messages. Period is 24.55 hr, and inclination is 1.4 deg. 1994-007B VEP (Vehicle Evaluation Payload), renamed MYOJO after launch, is a Japanese spacecraft that was launched by an H-2 rocket from Tanegashima Space Center at 22:20 UT. Initial orbital parameters are period 645 min, apogee 36,261 km, perigee 449 km, and inclination 28.6 deg. 1994-007A OREX (Orbital Re-entry Experiment vehicle), renamed RYUSEI after launch, is a Japanese spacecraft that was launched by an H-2 rocket from Tanegashima Space Center at 22:20 UT. Initial orbital parameters are period 93.5 min, apogee 6,829 km, perigee 6,828 km, and inclination 30.5 deg. 1994-006H BREMSAT, a German mini-satellite, was released from STS 60. Initial orbital parameters are period 91.4 min, apogee 363 km, perigee 344 km, and inclination 56.9 deg. 1994-006G, ODERACS F, -E, -D, -C, -B, -A are the U.S.A.'s six mini-targets -006F,-006E, that were released from STS 60. They are intended to provide radar -006D,-006C, cross-sections of very small objects. Initial orbital -006B parameters are the same as those of STS 60. 1994-006A STS 60, a U.S.A. shuttle, was launched from Cape Canaveral. On board was the SPACEHAB-02 facility to conduct 12 experiments. Among them were the following four GAS (Get Away Special) microgravity experiments: G-536--Pool Boiling experiment; G-557--Capillary Pumped Loop experiment; G-071--Ball Bearing experiment; and G-514--Orbiter Stability experiment. It also carried resources for high school/college science experiments. The shuttle released six mini-targets (ODERACS A-F) to provide radar calibration and a German mini-satellite, BREMSAT. Repeated efforts to deploy a three-meter diameter, retrievable shield (Wake Shield Facility) behind which pure crystals of Gallium Arsenide were planned to be grown were unsuccessful. Initial orbital parameters are period 91.7 min, apogee 386 km, perigee 358 km, and inclination 59.9 deg. 1994-005A PROGRESS M-21, a Russian automatic cargo shift, was launched at 02:12 UT to deliver supplies to the MIR space station. Initial orbital parameters are period 88.5 min, apogee 236 km, perigee 194 km, and inclination 51.6 deg. It docked with MIR at 03:56 UT on 30 January 1994. 1994-004A DSPSE (commonly known as Clementine) is a U.S.A. spacecraft that was launched from Vandenberg AFB by a Titan 2 rocket. Its main objective is to test the durability of lighter weight sensors that are required for interceptor missiles. It was maneuvered towards the Moon to take high resolution pictures, then to move away toward an asteroid to take pictures again, and finally to fade away forever into deep space. Initial orbital parameters are period 89.9 min, apogee 305 km, perigee 242 km, and inclination 66.9 km. 1994-003B TUBSAT, a German test spacecraft, was launched by a Cyclone booster from Plesetsk space station. Initial orbital parameters are the same as those of METEOR 3. (See below.) 1994-003A METEOR 3, a Russian spacecraft, was launched by a Cyclone booster from Plesetsk space station. It carried meteorological and radiation budget instruments. Also on board was a German PRARE navigational system to measure parameters of spacecraft motion. Initial orbital parameters are period 109.4 min, apogee 1,221 km, perigee 1,198 km, and inclination 82.6 deg. C. Spacecraft Particularly Suited for International Participation (Category I). 1. Spacecraft with essentially continuous radio beacons on frequencies less than 150 MHz, or higher frequencies if especially suited for ionospheric or geodetic studies. ("NNSS" denotes U.S. Navy Navigational Satellite System; an asterisk [*] indicates updated/new information since the last issue.) Designations, Epoch, Frequency, Power, National Name and Orbit Information Remarks 1964-83D (965) February 1, 1993 TRANSIT 5BN 5 136.65 MHz Inclination: 89.76 deg 1966-110A (02608) June 16, 1988 [Weak signals. VHF translator ATS 1 137.35 MHz on ~12 hr/day.] Inclination: 14.0 deg 1967-111A (03029) June 16, 1988 [Weak signals.] ATS 3 136.37 MHz 137.35 MHz Location: 105 deg W Inclination: 12.1 deg 1971-93A (5580) February 1, 1993 X 3 137.56 MHz Inclination: 82.05 deg 1973-081A (06909) September 15, 1988 [Operational transit. OSCAR (NAV) 20 150 MHz at 0.75 W Also known as NNSS 30200.] 400 MHz at 1.25 W Inclination: 89.9 deg 1975-100A (08366) June 29, 1991 GOES 1 136.38 MHz Location: 81.2 deg W Inclination: 10.5 deg 1977-048A (10061) October 24, 1993 GOES 2 136.38 MHz Location: 135.95 deg W Inclination: 9.4 deg 1978-012A (10637) December 26, 1991 IUE 136.86 MHz Inclination: 33.201 deg 1978-062A (10953) October 24, 1993 [Frequency drifts caused by GOES 3 136.38 MHz temperature variations.] Location: 176.2 deg W Inclination: 8.0 deg 1981-044A (12458) March 4, 1991 [Stored in orbit at NOVA I 150 MHz at 3.00 W maintenance frequency. 400 MHz at 5.00 W Also known as NNSS 30480.] Inclination: 90.0 deg 1981-122A (13010) March 21, 1993 MARECS-A 137.17 MHz Location: 22.8 deg E Inclination: 5.7 deg 1984-110A (15362) December 24, 1992 [Operational transit. NOVA III 150 MHz at 3.00 W Also known as NNSS 30500.] 400 MHz at 5.00 W Inclination: 90.0 deg 1984-114B (15386) March 21, 1993 MARECS-B2 137.17 MHz Location: 14.9 deg W Inclination: 3.6 deg 1984-123A (15427) January 5, 1992 NOAA 9 137.62 MHz Inclination: 99.158 deg 1985-066B (15936) February 26, 1991 [Stored in orbit at OSCAR (NAV) 30 150 MHz at 1.00 W maintenance frequency. 400 MHz at 2.00 W Also known as NNSS 30300.] Inclination: 89.9 deg 1986-017A (16609) October 27, 1991 MIR 145.550 MHz Inclination: 51.604 deg 1986-073A (16969) January 5, 1992 NOAA 10 137.50 MHz Inclination: 98.549 deg 1986-088A (17070) September 15, 1988 [Experimental. POLAR BEAR 150 MHz at 0.75 W Also known as NNSS 30170.] 400 MHz at 1.25 W Inclination: 89.9 deg 1987-18A (17527) February 1, 1993 MOS 1A 136.11 MHz Inclination: 99.09 deg 1987-054A (18129) October 27, 1991 COSMOS 1861 29.357 MHz 29.403 MHz 29.407 MHz Inclination: 82.926 deg 1987-080A (18361) December 5, 1988 [Operational transit. OSCAR (NAV) 27 150 MHz at 0.75 W Also known as NNSS 30270.] 400 MHz at 1.25 W Inclination: 90.3 deg 1987-080B (18362) February 7, 1991 [Operational transit. OSCAR (NAV) 29 150 MHz at 0.75 W Also known as NNSS 30290.] 400 MHz at 1.25 W Inclination: 90.3 deg 1988-033A (19070) January 31, 1989 [Operational transit. OSCAR (NAV) 23 150 MHz at 0.75 W Also known as NNSS 30230.] 400 MHz at 1.25 W Inclination: 90.4 deg 1988-033B (19071) February 26, 1991 [Operational transit. OSCAR (NAV) 32 150 MHz at 1.00 W Also known as NNSS 30320.] 400 MHz at 2.00 W Inclination: 90.4 deg 1988-051A (19215) March 31, 1993 [Transmits on command.] METEOSAT 3 137.080 MHz Location: 72.8 deg W Inclination: 0.7 deg 1988-052A (19223) September 15, 1988 [Operational transit. NOVA II 150 MHz at 3.00 W Also known as NNSS 30490.] 400 MHz at 5.00 W Inclination: 90.0 deg 1988-074A (19419) September 15, 1988 [Stored in orbit at an OSCAR (NAV) 25 150 MHz at 0.75 W offset frequency. 400 MHz at 1.25 W Also known as NNSS 30250. Inclination: 90.0 deg 1988-074B (19420) March 8, 1990 [Stored in orbit at an OSCAR (NAV) 31 150 MHz at 1.00 W offset frequency. 400 MHz at 2.00 W Also known as NNSS 30310.] Inclination: 98.971 deg 1988-089A (19531) January 5, 1992 NOAA 11 136.77 MHz 137.77 MHz Inclination: 99.059 deg 1990-13A (20478) February 1, 1993 MOS 1B 136.11 MHz Inclination: 99.09 deg 1990-017A (20508) July 18, 1991 NADEZHDA 2 150 MHz 400 MHz Inclination: 82.955 deg 1990-086A (20826) October 27, 1991 METEOR 2-20 137.850 MHz Inclination: 82.530 deg 1991-06A (21087) January 1, 1993 INFORMATOR 1 145.815 MHz Inclination: 82.94 deg 1991-86E (21835) February 1, 1993 MAGION 3 137.85 MHz Inclination: 82.57 deg 1991-007A (21089) July 18, 1991 COSMOS 2123 150 MHz 400 MHz Inclination: 82.923 deg 1991-019A (21152) July 18, 1991 NADEZHDA 3 150 MHz 400 MHz Inclination: 82.929 deg 1991-030A (21232) October 27, 1991 METEOR 3-4 137.300 MHz Inclination: 82.548 deg 1991-032A (21236) October 28, 1991 NOAA 12 137.500 MHz Inclination: 98.723 deg 1991-081A (21796) December 6, 1993 [INACTIVE. COSMOS 2173 149.97 MHZ Replaced by COSMOS 2239.] 388.84 MHz Inclination: 82.955 deg 1992-008A (21875) December 24, 1992 COSMOS 2180 149.94 MHz 399.84 MHz Inclination: 82.931 deg 1992-020A (21937) December 24, 1992 COSMOS 2184 149.91 MHz 399.76 MHz Inclination: 82.934 deg 1992-036A (22006) December 6, 1993 [INACTIVE. Replaced by COSMOS 2195 149.97 MHz reactivated COSMOS 2135 on 399.92 MHz August 3, 1993.] Inclination: 82.934 deg 1992-073A (22207) November 3, 1992 [Replacing 1991-059A, COSMOS 2218 149.94 MHz COSMOS 2154, in plane #3 399.84 MHz on November 4, 1992.] Inclination: 82.923 deg 1993-001A (22307) January 1, 1993 [Replacing 1992-12A, COSMOS COSMOS 2230 150.00 MHz 2181, in plane #11 on 400.00 MHz January 20, 1993.] Inclination: 82.945 deg 1993-008A (22487) February 18, 1993 [Replacing 1991-029A, COSMOS COSMOS 2233 150.03 MHz 2142, in plane #5 on February 400.08 MHz 17, 1993.] Inclination: 82.944 deg 1993-020A (22590) December 6, 1993 [Replacing 1991-081A, COSMOS COSMOS 2239 149.97 MHz 2173, in plane #4 on April 7, 399.84 MHz 1993.] Inclination: 82.93 deg 1993-070A (22888) December 6, 1993 [Replacing 1991-59A, COSMOS COSMOS 2266 149.97 MHz 2135, in plane #1 on November 399.84 MHz 10, 1993.] Inclination: 82.95 deg 2. Global Positioning System satellites useful for navigational purposes and geodetic studies. ("NNN" denotes no national name. SPACEWARN would appreciate suggestions to update this list. An asterisk [*] denotes changes in this issue.) Designations, Epoch, Frequency, National Name and Orbit Information Remarks 1983-072A (14189) June 22, 1992 Also known as NAVSTAR 8 NNN 1575.42 MHz and GPS 8. PRN: 11. 1227.60 MHz DEACTIVATED IN MAY 1993 AND Inclination: 63.601 deg REPLACED BY USA 91. 1984-059A (15039) September 8, 1991 Also known as NAVSTAR 9 and USA 1 1575.42 MHz GPS 9. PRN: 13. 1227.60 MHz Inclination: 63.363 deg 1984-097A (15271) September 9, 1991 [Also known as NAVSTAR 10 and USA 5 1575.42 MHz GPS 10. PRN: 12.] 1227.60 MHz Inclination: 62.973 deg 1985-093A (16129) September 8, 1991 [Also known as NAVSTAR 11 USA 10 1575.42 MHz and GPS 11. PRN: 3.] 1227.60 MHz Inclination: 64.115 deg 1989-013A (19820) August 17, 1991 [Also known as GPS 2-1 USA 35 1575.42 MHz (Second Generation Global 1227.60 MHz Positioning Satellite) and Inclination: 55.033 deg NAVSTAR 14. PRN: 14.] 1989-044A (20061) August 19, 1991 [Also known as GPS 2-2 and USA 38 1575.42 MHz NAVSTAR 13. PRN: 2.] 1227.60 MHz Inclination: 54.937 deg 1989-064A (20185) July 9, 1991 [Also known as GPS 2-3 and USA 42 1575.42 MHz NAVSTAR 16. PRN: 16.] 1227.60 MHz Inclination: 54.873 deg 1989-085A (20302) July 6, 1991 [Also known as GPS 2-4 and USA 47 1575.42 MHz NAVSTAR 17. PRN: 17.] 1227.60 MHz Inclination: 54.368 deg 1989-097A (20361) August 24, 1991 [Also known as GPS 2-5 and USA 49 1575.42 MHz NAVSTAR 19. PRN: 19.] 1227.60 MHz Inclination: 55.058 deg 1990-008A (20452) August 23, 1991 [Also known as GPS 2-6 USA 50 1575.42 MHz and NAVSTAR 18. PRN: 18.] 1227.60 MHz Inclination: 54.329 deg 1990-025A (20533) August 24, 1991 [Also known as GPS 2-7 USA 54 1575.42 MHz NAVSTAR 20. PRN: 10.] 1227.60 MHz Inclination: 55.202 deg 1990-068A (20724) August 23, 1991 [Also known as GPS 2-8 USA 63 1575.42 MHz and NAVSTAR 21. PRN: 21.] 1227.60 MHz Inclination: 54.671 deg 1990-088A (20830) August 24, 1991 [Also known as GPS 2-9 USA 64 1575.42 MHz and NAVSTAR 15. PRN: 15.] 1227.60 MHz Inclination: 54.984 deg 1990-103A (20959) September 4, 1991 [Also known as GPS 2-10 USA 66 1575.42 MHz and NAVSTAR 23. PRN: 23.] 1227.60 MHz Inclination: 54.893 deg 1991-047A (21552) September 17, 1991 [Also known as GPS 2-11, USA 71 1575.42 MHz GPS 2A-1, and NAVSTAR 24. 1227.60 MHz PRN: 24.] Inclination: 55.275 deg 1992-009A (21890) September 24, 1992 [Also known as GPS 2-12, USA 79 1575.42 MHz GPS 2A-2, and NAVSTAR 25. 1227.60 MHz PRN: 25.] Inclination: 55.57 deg 1992-019A (21930) September 24, 1992 [Also known as GPS 2-13, USA 80 1575.42 MHz GPS 2A-3, and NAVSTAR 26. 1227.60 MHz PRN: 26.] Inclination: 55.24 deg 1992-039A (22014) September 24, 1992 [Also known as GPS 2-14, USA 83 1575.42 MHz GPS 2A-4, and NAVSTAR 28. 1227.60 MHz PRN: 28.] Inclination: 55.04 deg 1992-058A (22108) September 24, 1992 [Also known as GPS 2-15, USA 84 1575.42 MHz GPS 2A-5,and NAVSTAR 27. 1227.60 MHz PRN: 27.] Inclination: 54.78 deg 1992-079A (22231) November 22, 1992 [Also known as GPS 2-16, USA 85 1575.42 MHz GPS 2A-6, and NAVSTAR 32. 1227.60 MHz PRN: 1.] Inclination: 53.50 deg 1992-089A (22275) December 24, 1992 [Also known as GPS 2-17, USA 87 1575.42 MHz GPS 2A-7,and NAVSTAR 29. 1227.60 MHz PRN: 29.] Inclination: 54.74 deg 1993-007A (22446) March 19, 1993 [Also known as GPS 2-18, USA 88 1575.42 MHz GPS 2A-8, and NAVSTAR 22. 1227.60 MHz PRN: 22.] Inclination: 54.83 deg 1993-017A (22581) September 28, 1993 [Also known as GPS 2-19, USA 90 1575.42 MHz GPS 2A-9, and NAVSTAR 31. 1227.60 MHz PRN: 31.] Inclination: 54.80 1993-032A (22657) September 28, 1993 [Also known as GPS 2-20, USA 91 1575.42 MHz GPS 2A-10, and NAVSTAR 37. 1227.60 MHz PRN: 7.] Inclination: 54.97 deg 1993-042A (22700) September 28, 1993 [Also known as GPS 2-21, USA 92 1575.42 MHz GPS 2A-11, and NAVSTAR 39. 1227.60 MHz PRN: 9.] Inclination: 54.70 deg 1993-054A (22779) September 27, 1993 [Also known as GPS 2-22, USA 94 1575.42 MHz GPS 2A-12, and NAVSTAR 35. 1227.60 MHz PRN: 5.] Inclination: 54.90 deg 1993-068A (22877) December 6, 1993 [Also known as GPS 2-23, USA 96 1574.42 MHz GPS 2A-13,and NAVSTAR 34. 1227.60 MHz PRN: 4] Inclination: 54.90 The GPS 2-NN series orbit in six distinct planes that are 60 deg apart. Each plane has four "slots." Following are the members of the planes/slots: PLANE RAAN OF PLANE SLOT-1 SLOT-2 SLOT-3 SLOT-4 A 269 2-21 2-12 2-15 2-04 B 329 2-18 2-07 2-02 2-22 C 29 2-23 2-13 2-19 2-20 D 89 2-11 2-09 2-05 ---- E 149 2-01 2-08 2-03 2-10 F 209 2-16 2-14 2-06 2-17 3. Actual decays/landings of payload spacecraft and rocket bodies (R/B) only. Additional information is not available. Designations Common Name 1994 1994-012B (23011) R/B RADUGA 31 21 Feb 1979-091A (11589) MOLNIYA 1-45 18 Feb 1994-004B (22974) R/B DSPSE 11 Feb 1994-006A (22977) STS 60 Landed on 11 Feb 1994-008B (22982) R/B RADUGA 1-3 07 Feb 1994-007A (22978) OREX 04 Feb 1994-005B (22976) R/B PROGRESS M-21 29 Jan 1993-078C (22932) R/B DBS 27 Jan 4. Miscellaneous Items. (This section contains information/data that are entered on occasion and may not be repeated in each issue of the SPACEWARN Bulletin.) An IACG/NASA-HQ sponsored science workshop was held in Easton, Maryland, U.S.A., during 26-29 January 1994, involving experiments on board IMP 8, Ulysses, Yohkoh, and other spacecraft of heliospheric interest. *************************************************************************** SPACEWARN BULLETIN ------------------- This bulletin is intended to serve as an international communication mechanism for the rapid distribution of information on satellites and space probes. The material it contains is based on guidelines in "COSPAR Guide to Rocket and Satellite Information and Data Exchange," COSPAR Transactions #8, December 1972, and various Committee on Space Research (COSPAR) resolutions. The SPACEWARN Bulletin is issued to COSPAR's national contacts for satellite information, Satellite Regional Warning Centers, and various leaders and participants in COSPAR activities. Recipients are requested to arrange for any further appropriate distribution of this bulletin to interested individuals and institutions in their regions or countries. All bulletins beginning with January 1991 (SPX-447) are now available on line; the SPX number increases by one for each succeeding month (for example, the January 1993 bulletin is SPX-471). Through DECnet: at prompt type:copy nssdca::anon_dir:[active.spx]spx.471 *.* Through FTP: at prompt type: ftp nssdca.gsfc.nasa.gov at the next prompt type: anonymous at the PASSWORD (NSSDCA.GSFC.GOV.ANONYMOUS) prompt hit: return at the next prompt type: get anon_dir:[000000.active.spx]spx.471 spx.471 Users are urged to submit their comments and suggestions for the improvement of this bulletin to Spacewarn Bulletin, World Data Center-A for Rockets and Satellites, Code 930.2, Goddard Space Flight Center, Greenbelt, Maryland 20771 U.S.A. CATEGORIES OF SPACECRAFT To improve the effectiveness of international distribution of satellite and space probe information via the SPACEWARN system, spacecraft are identified in categories according to the urgency and detail of information needed by the scientific community as: CATEGORY I: Spacecraft particularly suited for international participation, especially those for which prior arrangements have been circulated through COSPAR channels: essentially continuous satellite radio beacons usually on frequencies less than 150 MHz designed for cooperative ionospheric experiments; satellites with continuous telemetry of scientific experiments. Some of these may be balloon satellites, flashing satellites, or satellites in orbits of particular interest for which optical observations from the ground constitute a scientific experiment. CATEGORY II: Space experiments of unusual general scientific or popular interest: manned space flights or space probes if not for some reason included in Category I. CATEGORY III: All other space experiments: satellites with command telemetry only, test vehicles, etc., if not included in Category I or II. The SPACEWARN Bulletin contains the following information. Please note the accompanying explanations, where appropriate, as to coverage and sources of information since this is not repeated in the text. A. List of Recent International Designations. This list continues the tables given in previous bulletins.It also confirms the tentative designations assigned by the IUWDS World Warning Agency for Satellites acting on behalf of COSPAR via telegrams distributed over the SPACEWARN system. B. Texts of Launching Announcements. This section gives the texts of launching announcements of satellites and space probes received by the IUWDS World Warning Agency for Satellites at the NSSDC/WDC-A-R&S during the previous month. C. Spacecraft Particularly Suited for International Participation (Category I). These data are based on launching announcements or on information received from individuals, launching authorities, FBIS reports, and news magazines. Also included are decays of major objects, and miscellanous items.