Date: Sun, 13 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 #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: 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: 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 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>, , <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 , <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 ******************************