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Questions/comments about the content of these pages should be directed to: The World Warning Agency for Satellites, wwas@nssdca.gsfc.nasa.gov National Space Science Data Center, Mail Code 633 NASA Goddard Space Flight Center, Greenbelt, MD 20771 |
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1998-019E (25276) IRIDIUM 60 30 Mar 1998-018B (25263) IRIDIUM 61 25 Mar
1998-019D (25275) IRIDIUM 59 30 Mar 1998-018A (25262) IRIDIUM 51 25 Mar
1998-019C (25274) IRIDIUM 58 30 Mar 1998-017A (25260) SPOT 4 24 Mar
1998-019B (25273) IRIDIUM 57 30 Mar 1998-016A (25258) UHF F/O F8 16 Mar
1998-019A (25272) IRIDIUM 55 30 Mar 1998-015A (25256) Progress M-38 14 Mar
The last full list appeared as a part of SPX 520. The list will reappear only after major updates to the list are available.
High precision (<20 cm) GPS constellation tracking data obtained from the network of about 80 dedicated global stations that are of interest to geodetic study may be obtained through the following services provided by the International Association of Geodesy (IGS)
FTP: igscb.jpl.nasa.gov [directory /igscb]
WWW: http://igscb.jpl.nasa.gov/
E-mail: igscb@cobra.jpl.nasa.gov
The standard format of the GPS situation appeared in SPX-518. It will not be repeated since an excellent source of trajectory- and science-related GPS information is at http://www.utexas.edu/depts/grg/gcraft/notes/gps/gps.html#DODSystem It provides many links to GPS related databases.
The latest member of the GPS fleet is NAVSTAR 38 (1997-067A), launched on 6 November 1997.
All GLONASS spacecraft are in the general COSMOS series. The COSMOS numbers (nnnn) invoked by USSPACECOM have often differed from the numbers (NNNN) associated in Russia; when different, the USSPACECOM COSMOS numbers are shown in parentheses. The corresponding GLONASS numbers are Russian numbers, followed by the numbers in parentheses that are sometimes attributed to them outside Russia.
The operating frequencies in MHz are computed from the channel number K. Frequencies (MHz) = 1602.0 + 0.5625K and L2 = 1246.0 + 0.4375K.
The standard format of the GLONASS situation appeared in SPX-515. It will not be repeated in view of the excellent updated source at: http://www.rssi.ru/SFCSIC/glonass.html maintained by the Coordinational Scientific Information Center (CSIC),Russian Space Forces.
Designations Common Name 1998 1997-062B (25011) R/B LONGMARCH 3 18 Mar 1998-015B (25257) R/B SOYUZ-V 16 Mar 1997-081A (25102) PROGRESS M-37 16 Mar 1997-059B (25005) R/B ATLAS 2AS 15 mar 1978-094A (11055) COSMOS 1043 27 Feb
The Japanese spacecraft COMETS (1998-011A; post-launch name KAKEHASHI), which failed to attain geosynchronous orbit, is undergoing delta-V maneuvers. The first of the planned seven such maneuvers has now raised the perigee from 250 km to 390 km; the target for the maneuvers is a perigee of 500 km.
The Russian geosynchronous spacecraft KUPON (1997-070A) that was launched in November 1997 has been declared inoperable since a vital computer on board has failed.
In SPX-532 the name of the spacecraft 1998-010B (25170) was reported as IRIDIUM 51. It should be corrected to read IRIDIUM 56.
NSSDC/WDC-A-R&S is an archival center for science data from many spacecraft.
Some data are on line for electronic access. Please contact the NSSDC Request Coordination
Office,
Code 633, NASA/GSFC, Greenbelt, Maryland 20771, U.S.A., for specific
information (request@nssdca.gsfc.nasa.gov).
Information on the current
status of the instruments on board from the investigators will be most
welcomed. Precomputed trajectory files
and orbital parameters of many magnetospheric and heliospheric science-payload
spacecraft may be FTP'ed from NSSDC's ANON_DIR:[000000.ACTIVE] and its
several subdirectories. (See About the SPACEWARN Bulletin
for access method; a file in the ACTIVE directory named AAREADME.DOC, outlines the contents.)
It can also be accessed via the WWW at:
http://sscop1.gsfc.nasa.gov/ssc.html
This URL also enables executing several codes related to the orbits
of many geocentric science payload spacecraft. The codes related to
the heliospheric spacecraft trjectories can be executed through:
http://nssdc.gsfc.nasa.gov/space/helios/heli.html
Magnetospheric, Planetary, and Astronomical science data from many spacecraft
may be accessed through links from the URL:
http://nssdc.gsfc.nasa.gov/
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Questions/comments about the content of these pages should be directed to: The World Warning Agency for Satellites, wwas@nssdca.gsfc.nasa.gov National Space Science Data Center, Mail Code 633 NASA Goddard Space Flight Center, Greenbelt, MD 20771 |