Date: Thu, 24 Mar 94 04:30:42 PST From: Ham-Space Mailing List and Newsgroup Errors-To: Ham-Space-Errors@UCSD.Edu Reply-To: Ham-Space@UCSD.Edu Precedence: Bulk Subject: Ham-Space Digest V94 #69 To: Ham-Space Ham-Space Digest Thu, 24 Mar 94 Volume 94 : Issue 69 Today's Topics: Navstar GPS Constellation Status (94-03-23) Telecom and Meteors Send Replies or notes for publication to: Send subscription requests to: Problems you can't solve otherwise to brian@ucsd.edu. Archives of past issues of the Ham-Space Digest are available (by FTP only) from UCSD.Edu in directory "mailarchives/ham-space". We trust that readers are intelligent enough to realize that all text herein consists of personal comments and does not represent the official policies or positions of any party. Your mileage may vary. So there. ---------------------------------------------------------------------- Date: 23 Mar 1994 06:06:26 -0800 From: dont-send-mail-to-path-lines@ames.arpa Subject: Navstar GPS Constellation Status (94-03-23) To: ham-space@ucsd.edu Navstar GPS Constellation Status (94-03-23) Blk NASA Orbit Launch II PRN Internat. Catalog Plane Date Seq SVN Code ID Number Pos'n (UT) Clock Available/Decommissioned -------------------------------------------------------------------------------- Block I 01 04 1978-020A 10684 78-02-22 78-03-29 85-07-17 02 07 1978-047A 10893 78-05-13 78-07-14 81-07-16 03 06 1978-093A 11054 78-10-06 78-11-13 92-05-18 04 08 1978-112A 11141 78-12-10 79-01-08 89-10-14 05 05 1980-011A 11690 80-02-09 80-02-27 83-11-28 06 09 1980-032A 11783 80-04-26 80-05-16 91-03-06 07 81-12-18 Launch failure 08 11 1983-072A 14189 83-07-14 83-08-10 93-05-04 09 13 1984-059A 15039 C-1 84-06-13 Rb 84-07-19 10 12 1984-097A 15271 A-1 84-09-08 Rb 84-10-03 11 03 1985-093A 16129 C-4 85-10-09 Rb 85-10-30 Block II II-1 14 14 1989-013A 19802 E-1 89-02-14 Cs 89-04-15 05:02 UT II-2 13 02 1989-044A 20061 B-3 89-06-10 Cs 89-08-10 20:46 UT II-3 16 16 1989-064A 20185 E-3 89-08-18 Cs 89-10-14 20:21 UT II-4 19 19 1989-085A 20302 A-4 89-10-21 Cs 89-11-23 03:13 UT II-5 17 17 1989-097A 20361 D-3 89-12-11 Cs 90-01-06 03:30 UT II-6 18 18 1990-008A 20452 F-3 90-01-24 Cs 90-02-14 22:26 UT II-7 20 20 1990-025A 20533 B-2 90-03-26 Cs 90-04-18 23:13 UT II-8 21 21 1990-068A 20724 E-2 90-08-02 Cs 90-08-22 15:00 UT II-9 15 15 1990-088A 20830 D-2 90-10-01 Cs 90-10-15 00:39 UT Block IIA II-10 23 23 1990-103A 20959 E-4 90-11-26 Cs 90-12-10 23:45 UT II-11 24 24 1991-047A 21552 D-1 91-07-04 Rb 91-08-30 04:44 UT II-12 25 25 1992-009A 21890 A-2 92-02-23 Cs 92-03-24 11:00 UT II-13 28 28 1992-019A 21930 C-2 92-04-10 Cs 92-04-25 20:32 UT II-14 26 26 1992-039A 22014 F-2 92-07-07 Cs 92-07-23 19:43 UT II-15 27 27 1992-058A 22108 A-3 92-09-09 Cs 92-09-30 20:08 UT II-16 32 01 1992-079A 22231 F-1 92-11-22 Cs 92-12-11 14:49 UT II-17 29 29 1992-089A 22275 F-4 92-12-18 Cs 93-01-05 16:39 UT II-18 22 22 1993-007A 22446 B-1 93-02-03 Cs 93-04-04 05:20 UT II-19 31 31 1993-017A 22581 C-3 93-03-30 Cs 93-04-13 20:53 UT II-20 37 07 1993-032A 22657 C-4 93-05-13 Cs 93-06-12 16:15 UT II-21 39 09 1993-042A 22700 A-1 93-06-26 Cs 93-07-20 12:54 UT II-22 35 05 1993-054A 22779 B-4 93-08-30 Cs 93-09-28 19:29 UT II-23 34 04 1993-068A 22877 D-4 93-10-26 Cs 93-11-22 18:20 UT II-24 36 06 1994-016A 23027 C-1 94-03-10 Projected usable 94-04-18 38 To be launched on need in FY '94 33 To be launched on need in FY '94 40 To be launched on need in FY '95 30 To be launched on need in FY '95 Notes ----- 1. NASA Catalog Number is also known as NORAD or U.S. Space Command object number. 2. No orbital plane position = satellite no longer operational. 3. Clock: Rb = Rubidium; Cs = Cesium 4. S/A had been enabled on Block II satellites during part of 1990; S/A off between about 10 August 1990 and 1 July 1991 due to Gulf crisis; standard level re-implemented on 15 November 1991. Currently, PRN15 and PRN20 appear to have little or no S/A imposed. 5. Anti-spoofing was activated on 94-01-31 at 0000 UT on all Block II satellites. (ref. NANU 050-94042) 6. PRN number of SVN32 was changed from 32 to 01 on 93-01-28. 7. PRN03 is operating on Rb clock without temperature control. 8. PRN03 was set unhealthy on 94-02-27 at 0320 UT. It was unusable beginning at 0233 UT on 94-02-27 and will remain unusable until further notice due to "end of life testing." (ref. NANU 057-94059 and NANU 083-94059). It is unlikely that PRN03 will return to service. (ref. USNO) 9. The decommissioning date for PRN06/SVN03 is the date of termination of operations of this satellite (ref. USNO) and is about 3 weeks later than the date GPSIC gives for "deactivation". 10. The PRN06/SVN36 launch included the SEDS-2 tether experiment on the Delta II rocket body (object 23028, 1994-016B). 11. PRN09 was unusable beginning 93-10-15 1200 UT until 93-12-07 1940 UT due to testing. (ref. NANU 327-93288 and NANU 402-93341) 12. The power supply of PRN13 may have insufficient capacity to maintain L1/L2 transmissions during eclipse season. During this period, the L1/L2 transmissions of PRN13 may be turned off for up to 12 hours a day. (ref. NANU 285-92315) 13. The degraded C/A-code performance of PRN19 was corrected effective 94-01-04 at 0000 UT. (ref. NANU 343-93294, NANU 396-93337, and NANU 006-94010) 14. PRN24 was unusable from 94-01-23 1745 UT until 94-02-01 1516 UT due to a change in operational frequency standard from Cs to Rb. (ref. NANU 023-94023, NANU 029-94024, NANU 034-94032, and USNO) =============================================================================== Richard B. Langley Internet: LANG@UNB.CA or SE@UNB.CA Geodetic Research Laboratory BITnet: LANG@UNB or SE@UNB Dept. of Geodesy and Geomatics Engineering Phone: (506) 453-5142 University of New Brunswick FAX: (506) 453-4943 Fredericton, N.B., Canada E3B 5A3 Telex: 014-46202 =============================================================================== ------------------------------ Date: Wed, 23 Mar 1994 15:18:20 GMT From: ihnp4.ucsd.edu!usc!sol.ctr.columbia.edu!jabba.ess.harris.com!news.ess.harris.com!p15jg.ess.harris.com@network.ucsd.edu Subject: Telecom and Meteors To: ham-space@ucsd.edu In Article <1994Mar23.001205.21873@rs6000.cmp.ilstu.edu> "cdfore@rs6000.cmp.ilstu.edu (Curt Fore)" says: > > Help!! I'm Looking for info on using meteors to bounce signals for > telecommunication. I saw a show in January on it. Now I have to write a > paper on something in telecommunication and as you can see my writing sucks. Amateur radio operators use this (sometimes). April "QST" magazine has a table of current record-holders using various "modes" of propogation for microwave communications and I think meteor-scatter is one of the ones shown. In any event, meteor-scatter should be covered in the "ARRL HANDBOOK", available in many bookstores (particularly University Bookstores at schools with significant technical orientation). Other amateur radio magazines that you might look at are probably in your school library, and certainly in any large bookstores around there. R.C. LOKERSON (BOB) MAIL ADDRESS: VOICE : 407.729.2257 HARRIS MDSO/MIS/DCC/ATG HARRIS E.S.S. SMTP : RLOKER01@IC1D.HARRIS.COM BLDG 15/RM 838 P.O. BOX 37 CCMAIL: RLOKER01 PALM BAY, FLORIDA MELBOURNE FL FCC : WA3PKX 32902 HOME : 407.725.8024 (I WROTE IT, NOT MR. HARRIS) "ANY CONCEPT NOT RELATED TO 'FONTS' WHICH CANNOT BE EXPRESSED IN 3 FONTS ... CANNOT BE EXPRESSED IN 3000 FONTS." ------------------------------ End of Ham-Space Digest V94 #69 ******************************