home *** CD-ROM | disk | FTP | other *** search
- Date: Sun, 13 Mar 94 04:30:42 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 #56
- To: Ham-Space
-
-
- Ham-Space Digest Sun, 13 Mar 94 Volume 94 : Issue 56
-
- Today's Topics:
- new stsplus?? (2 msgs)
-
- 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: Sat, 12 Mar 94 19:22:28 -0500
- From: yale.edu!noc.near.net!news.delphi.com!usenet@yale.arpa
- Subject: new stsplus??
- To: ham-space@ucsd.edu
-
- I have heard a few rumors about SOP94???, and that it tracks
- multiple sats. Any info on validity, ftp availability,
- or otherwise would be grealyly appreciated
-
- thanks
-
- pete brunelli
- n1qdq
-
- ------------------------------
-
- Date: Sun, 13 Mar 1994 09:36:41 +0000
- From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!pipex!demon!isis.demon.co.uk!ian@network.ucsd.edu
- Subject: new stsplus??
- To: ham-space@ucsd.edu
-
- In article <BE7sY6c.brunelli_pc@delphi.com> brunelli_pc@delphi.com writes:
-
- >I have heard a few rumors about SOP94???, and that it tracks
- >multiple sats. Any info on validity, ftp availability,
- >or otherwise would be grealyly appreciated
- >
- >thanks
- >
- >pete brunelli
- >n1qdq
- >
-
- I thought that STSPLUS had tracked multiple sats since version 9333.
- Having said that, there appears to be several new versions per year,
- so a 94?? has probable appeared. For some reason, STSPLUS has always
- been hard to get via FTP. The BBS is the best place and CIS appears
- to be kept up to date. FWIW the latest I've seen is 9353.
-
- Regards
- Ian.
- --
-
- | Ian Smith | "The Moving Finger writes;
- | ian@isis.demon.co.uk | and, having writ, Moves on."
-
- ------------------------------
-
- Date: 12 Mar 1994 22:27:29 GMT
- From: ihnp4.ucsd.edu!sdd.hp.com!col.hp.com!gag.com!bdale@network.ucsd.edu
- To: ham-space@ucsd.edu
-
- References <2lh20r$auf@bigfoot.wustl.edu>, <CMEnED.G1M@hpcvsnz.cv.hp.com>, <1994Mar11.185311.15115@nntpd2.cxo.dec.com>
- Subject : Re: GPS Receiver Boards
-
- bonomo@specxn.enet.dec.com wrote:
-
- : I've sent for the specs from Motorola...
-
- : If the product is up to snuff...
-
- I've worked with, or have friends who have worked with, the Rockwell, Trimble,
- and Motorola receiver cores. Concensus is that the Motorola core is the best
- for time-transfer applications. The Trimble has a well-defined but annoying
- jitter to the 1pps signal, the Rockwell gives a 1pps signal that is precise
- and fairly stable but not aligned with the edge of a second, complicating
- host software.
-
- All give good results for position and velocity applications. If you want to
- fly them on weather balloons and such, the Motorola behaves best, holding the
- last valid position when you hit the COCOM restriction height, the Trimble
- resets to their corporate offices in CA, reportedly. I don't know anyone who
- has flown a Rockwell in this application.
-
- The Rockwell has a GaAs frontend so can work well with non-amplified patch
- antennas over short coax runs. The Trimble and Motorola units benefit from
- an amplified patch or better antenna.
-
- In summary, if ya gotta do a group purchase, go with the Mot units, and if the
- price is good, I know a dozen or so folks (working on the AMSAT P3D GPS
- project) who are likely to be interested in buying one to play with.
-
- 73 - Bdale, N3EUA
-
- ------------------------------
-
- Date: 13 Mar 1994 00:12:27 GMT
- From: ihnp4.ucsd.edu!swrinde!elroy.jpl.nasa.gov!nntp-server.caltech.edu!palmer@network.ucsd.edu
- To: ham-space@ucsd.edu
-
- References <CMEnED.G1M@hpcvsnz.cv.hp.com>, <1994Mar11.185311.15115@nntpd2.cxo.dec.com>, <2ltfkh$31f@winfree.gag.com>
- Subject : Re: GPS Receiver Boards
-
- bdale@gag.com (Bdale Garbee) writes:
-
- >All give good results for position and velocity applications. If you want to
- >fly them on weather balloons and such, the Motorola behaves best, holding the
- >last valid position when you hit the COCOM restriction height, the Trimble
- >resets to their corporate offices in CA, reportedly. I don't know anyone who
- >has flown a Rockwell in this application.
-
- Apparently the restriction is only required when you exceed certain
- altitude AND speed limit simultaneously. Our group has successfully
- used GPS (the Rockwell card, I am ~90% sure) on scientific balloons
- (~125,000 feet, but typically much less than a hundred miles per hour).
- We were warned that early versions of the board we used would not
- work, because it unnecesarily restricted at either a certain altitude
- OR speed limit.
-
- Contact the companies for futher details.
- --
- David M. Palmer palmer@alumni.caltech.edu
- palmer@tgrs.gsfc.nasa.gov
- Clipper: Privacy for people who have nothing to hide.
-
- ------------------------------
-
- End of Ham-Space Digest V94 #56
- ******************************
-