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- Date: Mon, 28 Feb 94 04:30:49 PST
- From: Ham-Space Mailing List and Newsgroup <ham-space@ucsd.edu>
- Errors-To: Ham-Space-Errors@UCSD.Edu
- Reply-To: Ham-Space@UCSD.Edu
- Precedence: Bulk
- Subject: Ham-Space Digest V94 #42
- To: Ham-Space
-
-
- Ham-Space Digest Mon, 28 Feb 94 Volume 94 : Issue 42
-
- Today's Topics:
- Need COSPAS/SARSAT System information.
- TO: Mr. Bill Freeman
- Two-Line Orbital Element Set Format
-
- Send Replies or notes for publication to: <Ham-Space@UCSD.Edu>
- Send subscription requests to: <Ham-Space-REQUEST@UCSD.Edu>
- 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: 27 Feb 94 06:44:44 GMT
- From: news-mail-gateway@ucsd.edu
- Subject: Need COSPAS/SARSAT System information.
- To: ham-space@ucsd.edu
-
- Hi!
- I'm developing an Emergency Beacon for Positioning and Rescue of ship and
- aircraft use, and I need some information about the COSPAS/SARSAT satellite
- system.
-
- Basically, I want to know what information must be sent, how it has to be
- encoded on each of the three frequencies (121.5 MHz, 243 MHz and 406 MHz).
-
- If you have ANY of this information (or part of it), please send it to me (or
- at least let me know) via the following paths:
-
- Packet radio: lu7akc @ lu7akc.#col.cf.arg.soam
- Internet: postmaster@asarin.org.ar
-
- Thankyou in advance!
-
- 73's de Ed Sweet.
-
- ------------------------------
-
- Date: 27 Feb 1994 04:54:47 GMT
- From: solaris.cc.vt.edu!dogwood!bergst@uunet.uu.net
- Subject: TO: Mr. Bill Freeman
- To: ham-space@ucsd.edu
-
- Mail to you system bounced. (could be our network)
-
- Thank you for the information. It was very helpful.
-
- Rob Bergstrom
- Virginia Tech
-
- ------------------------------
-
- Date: Sat, 26 Feb 1994 15:45:17 MST
- From: ihnp4.ucsd.edu!swrinde!cs.utexas.edu!math.ohio-state.edu!cyber2.cyberstore.ca!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu
- Subject: Two-Line Orbital Element Set Format
- To: ham-space@ucsd.edu
-
- As a service to the satellite user community, the following description of the
- NORAD two-line orbital element set format is uploaded to sci.space.news and
- rec.radio.info on a monthly basis. The most current orbital elements
- from the NORAD two-line element sets are carried on the Celestial BBS, (513)
- *253-9767*, and are updated daily (when possible). Documentation and tracking
- software are also available on this system. The Celestial BBS may be accessed
- 24 hours/day at 300, 1200, 2400, 4800, or 9600 bps using 8 data bits, 1 stop
- bit, no parity. In addition, element sets (also updated daily) and some
- documentation and software are also available via anonymous ftp from
- archive.afit.af.mil (129.92.1.66) in the directory pub/space.
-
- ==============================================================================
-
- Data for each satellite consists of three lines in the following format:
-
- AAAAAAAAAAA
- 1 NNNNNU NNNNNAAA NNNNN.NNNNNNNN +.NNNNNNNN +NNNNN-N +NNNNN-N N NNNNN
- 2 NNNNN NNN.NNNN NNN.NNNN NNNNNNN NNN.NNNN NNN.NNNN NN.NNNNNNNNNNNNNN
-
- Line 0 is a eleven-character name.
-
- Lines 1 and 2 are the standard Two-Line Orbital Element Set Format identical
- to that used by NORAD and NASA. The format description is:
-
- Line 1
- Column Description
- 01-01 Line Number of Element Data
- 03-07 Satellite Number
- 10-11 International Designator (Last two digits of launch year)
- 12-14 International Designator (Launch number of the year)
- 15-17 International Designator (Piece of launch)
- 19-20 Epoch Year (Last two digits of year)
- 21-32 Epoch (Julian Day and fractional portion of the day)
- 34-43 First Time Derivative of the Mean Motion
- or Ballistic Coefficient (Depending on ephemeris type)
- 45-52 Second Time Derivative of Mean Motion (decimal point assumed;
- blank if N/A)
- 54-61 BST
- Otherwise, radiation pressure coefficient. (Decimal point assumed)
- 63-63 Ephemeris type
- 65-68 Element number
- 69-69 Check Sum (Modulo 10)
- (Letters, blanks, periods, plus signs = 0; minus signs = 1)
-
- Line 2
- Column Description
- 01-01 Line Number of Element Data
- 03-07 Satellite Number
- 09-16 Inclination [Degrees]
- 18-25 Right Ascension of the Ascending Node [Degrees]
- 27-33 Eccentricity (decimal point assumed)
- 35-42 Argument of Perigee [Degrees]
- 44-51 Mean Anomaly [Degrees]
- 53-63 Mean Motion [Revs per day]
- 64-68 Revolution number at epoch [Revs]
- 69-69 Check Sum (Modulo 10)
-
- All other columns are blank or fixed.
-
- Example:
-
- NOAA 6
- 1 11416U 86 50.28438588 0.00000140 67960-4 0 5293
- 2 11416 98.5105 69.3305 0012788 63.2828 296.9658 14.24899292346978
- --
- Dr TS Kelso Assistant Professor of Space Operations
- tkelso@afit.af.mil Air Force Institute of Technology
-
- ------------------------------
-
- End of Ham-Space Digest V94 #42
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