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- Date: Sat, 12 Feb 94 04:30:28 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 #26
- To: Ham-Space
-
-
- Ham-Space Digest Sat, 12 Feb 94 Volume 94 : Issue 26
-
- Today's Topics:
- Inexpensive GPS
- MIR
- STS-62 Element Set (94062.636)
-
- 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: 5 Feb 94 17:16:00 GMT
- From: agate!doc.ic.ac.uk!uknet!pipex!demon!dis.demon.co.uk!myth.demon.co.uk!zeus@ucbvax.berkeley.edu
- Subject: Inexpensive GPS
- To: ham-space@ucsd.edu
-
- In article <4FEB199411293694@zeus.tamu.edu>
- tskloss@zeus.tamu.edu "SKLOSS, TIMOTHY WILLIAM" writes:
-
- > In article <1994Feb3.023037.58100@kuhub.cc.ukans.edu>,
- > shdomaji@kuhub.cc.ukans.edu writes...
- > >I have been intrested in global positioning. I have seen units for under
- > >$600, and pc interface and logging is available. Do the makers of these units
- > >pay for the service of the satalites. (Can these signals be received with
- > >pc software and receiver or receivers and used for global positioning.)
-
- It is free. The U.S. taxpayer funds it (aren't they nice).
-
-
- >
- > Well, forget making a GPS receiver yourself unless you can get a
- > GPS chip from Motorola ($35). The nature of the signals demands very high
- > timing resolution, so high that it requires specially built components. Most
- > of which (i think) are incorporated in the Motorola chip. This chip, by the
- > way, is the heart of almost all GPS receivers on the current market.
- >
-
-
- Bilgewater. Sorry Tim, this isn't a flame, honestly. GEC/Plessey produce
- a GP1010 / GP1020 chipset which looks like costing about 100 / pair in
- quantity, but it is much better than the Motorola (I think?). The GP1010
- converts the 1.5 Gigs signal down to a lower frequency digitized version. The
- GP1020 has 6 digital 'receivers' (correlators, sometimes implemented in
- software). A lot of manufacturers use their own system, Transputers / custom
- hardware etc. Time resolution is no problem. The chipset is adjustable and
- can be calibrated by it's driver software if enough sats are in view. Time is
- just another dimension like x,y,z (lat, long, height).
-
-
- > My advice is to wait. GPS prices have already halved in the last two years
- > and the interfaces (the most important part in my opinion) just keep on
- > getting better. It will soon be like cellular telephones: the whole phone
- > on one chip with a few RF pieces; but you won't have to pay for the service.
- > Since cars already have GPS's as standard equipment (on some models), you
- > will see the prices fall even more.
- >
- > -tim
- >
-
- GPSs are already on a 2 piece chipset + processor. The Iridium system
- will have GPS receivers built in. I reckon on about $10 for a chipset by 2000.
- Easily.
-
- --
-
- Michael S. Cowgill (Mike) \_ My opinions! MINEMINEALLMINEHAHAHAHA!
- zeus@myth.demon.com (That's me) \_ #include <witticism.h> or if #undef
- G1VOX@GB7WRG.GBR.EU 44.131.2.76 \_ " ...Cracking toast Grommit!... "
-
- ------------------------------
-
- Date: 8 Feb 94 00:20:23 GMT
- From: netcon!bongo!skyld!jangus@locus.ucla.edu
- Subject: MIR
- To: ham-space@ucsd.edu
-
- Anybody have recent KEPS for the MIR craft?
- I noticed that R0MIR was up and running this weekend along with STS
-
-
- Amateur: WA6FWI@WA6FWI.#SOCA.CA.USA.NA | "It is difficult to imagine our
- Internet: jangus@skyld.tele.com | universe run by a single omni-
- US Mail: PO Box 4425 Carson, CA 90749 | potent god. I see it more as a
- Phone: 1 (310) 324-6080 | badly run corporation."
-
- ------------------------------
-
- Date: Fri, 11 Feb 1994 23:35:04 GMT
- From: telesoft!garym@uunet.uu.net
- Subject: STS-62 Element Set (94062.636)
- To: ham-space@ucsd.edu
-
- STS-62
- 1 00062U 94062.63664409 .00073440 00000-0 22129-3 0 29
- 2 00062 39.0115 247.8629 0006644 298.2691 61.7477 15.90695888 27
-
- Satellite: STS-62
- Catalog number: 00062
- Epoch time: 94062.63664409 = (03 MAR 94 15:16:46.05 UTC)
- Element set: 002
- Inclination: 39.0115 deg
- RA of node: 247.8629 deg Space Shuttle Flight STS-62
- Eccentricity: .0006644 Prelaunch Element set JSC-002
- Arg of perigee: 298.2691 deg Launch: 03 MAR 94 13:54 UTC
- Mean anomaly: 61.7477 deg
- Mean motion: 15.90695888 rev/day G. L. Carman
- Decay rate: 7.3440e-04 rev/day*2 NASA Johnson Space Center
- Epoch rev: 2
-
- (for Shuttle Elements subscription info, email: listserv@alsys.com)
-
- --
- Gary Morris KK6YB Internet: elements-request@alsys.com
- San Diego, CA, USA Phone: +1 619-457-2700
-
- ------------------------------
-
- Date: Thu, 10 Feb 1994 10:30:38 GMT
- From: telesoft!garym@uunet.uu.net
- To: ham-space@ucsd.edu
-
- References <STS-60,94034.567@alsys.com>, <STS-60,94039.590@alsys.com>, <STS-60,94040.289@alsys.com>
- Reply-To : elements-request@alsys.com
- Subject : STS-60 Element Set (94041.688)
-
- STS-60
- 1 22977U 94006A 94041.68880588 .00001098 -91503-7 80760-5 0 143
- 2 22977 56.9892 183.8290 0006683 303.1211 56.9216 15.71605210 1146
-
- Satellite: STS-60
- Catalog number: 22977
- Epoch time: 94041.68880588 = (10 FEB 94 16:31:52.82 UTC)
- Element set: 014
- Inclination: 56.9892 deg
- RA of node: 183.8290 deg Space Shuttle Flight STS-60
- Eccentricity: .0006683 Keplerian Element set JSC-014
- Arg of perigee: 303.1211 deg from NASA flight Day 8 vector
- Mean anomaly: 56.9216 deg
- Mean motion: 15.71605210 rev/day G. L. Carman
- Decay rate: 1.098e-05 rev/day^2 NASA Johnson Space Center
- Epoch rev: 114
-
- (for Shuttle Elements subscription info, email: listserv@alsys.com)
-
- --
- Gary Morris KK6YB Internet: elements-request@alsys.com
- San Diego, CA, USA Phone: +1 619-457-2700
-
- ------------------------------
-
- End of Ham-Space Digest V94 #26
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