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1994-06-04
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16KB
Date: Mon, 7 Mar 94 04:30:45 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 #50
To: Ham-Space
Ham-Space Digest Mon, 7 Mar 94 Volume 94 : Issue 50
Today's Topics:
* G.R.A.P.S. *
ANS-064 BULLETINS
GPS information/schematics
GPS Receiver Boards
Help with FCC Notification fpr SPACE operations ?
v2l9331.zip - Hams: Converts raw OSV's to Two-Line Elements
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: 6 Mar 94 23:41:58 GMT
From: news-mail-gateway@ucsd.edu
Subject: * G.R.A.P.S. *
To: ham-space@ucsd.edu
SB ALL @ AMSAT < LU3BDH $LU3AGJ20892
* G.R.A.P.S. *
I have the pleasure to announce that on March 1st was constituted the
"G.R.A.P.S" GRUPO RADIOAFICIONADOS ARGENTINO POR SATELITE.
ARGENTINE AMATEURS VIA SATELLITE GROUP.
The objectives of this group are strictly technical, in the developmentt, study
and construction of satellite experiments, with the logic ambition that our
"LUSAT-1" don't get held in history.
Unfortunately, our technicians lost the oportunity to applicate their knowhow
and ambitions in the multi-national Phase-3D.
Our heading is to re-create the experiences of our "LUSAT-1", and others that
may come from other countries, sharing the participation and looking forward
for the major goal: another satellite!
I invite everyone that want to join the group actively. He/she will have a
place, being a ham or not, being universities, technicians, engineers, schools,
radio clubs, other institutions, etc.
------------------------------
Date: Sun, 6 Mar 1994 13:22:35 MST
From: ihnp4.ucsd.edu!usc!math.ohio-state.edu!cyber2.cyberstore.ca!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu
Subject: ANS-064 BULLETINS
To: ham-space@ucsd.edu
SB SAT
UOSAT-2 TURNS 10 YEARS OLD
HR AMSAT NEWS SERVICE BULLETIN 064.01 FROM AMSAT HQ
SILVER SPRING, MD MARCH 6, 1994
TO ALL RADIO AMATEURS BT
BID: $ANS-064.01
UOSAT-2 (UO-11) Celebrates 10 Years Of On-Orbit Service
At 17:59 UTC on March 1st, 1984, the second satellite designed and built
by the University of Surrey, UoSAT-2 (UO-11) was launched on a Delta
rocket from the Western Test Range at Vandenberg Air Force Base,
California.
Among its many experiments, UoSAT-2 carried the Digital Communications
Experiment, which was one of the first (if not THE first!) non-military
use of store-and-forward techniques with Low Earth Orbiting satellites.
UoSAT-2 was an early test-bed for many of the technologies that have
since been incorporated into a number of other packet radio satellites.
For all those who wonder how long these satellites last, it should be
noted that UoSAT-2 is still operational, ten years after launch!
Happy Birthday UoSAT-2 !!!
[The AMSAT News Service (ANS) would like to thank Eric Rosenberg (WD3Q)
for the information contained in this bulletin item. Eric can be
contacted at his INT
/EX
SB SAT
SAMPLE RS-15 KEPS
HR AMSAT NEWS SERVICE BULLETIN 064.02 FROM AMSAT HQ
SILVER SPRING, MD MARCH 6, 1994
TO ALL RADIO AMATEURS BT
BID: $ANS-064.02
KE3HP Presents A "Sample" Keplerian Element Set For RS-15
Based on information about RS-15's orbital paramaeters in last week's ANS
bulletins, KE3HP has generated a set of predicted elements for this satel-
lite. KE3HP assumed that the launch would be from Plesetsk at 12:00 UTC on
01-MAY-94. He generated these elements using OrbiTrack, an excellent
MacIntosh shareware program by Bill Bard.
Satellite RS-15 predicted
Catalog Number 99999
Epoch 94 121.57362967 05/01/94 13:46:02 UTC
Drag2 0.00000000 Rev/Day^2
Inclination 67.0000 Deg
RAAN 22.8163 Deg
Eccentricity 0.0001152
Argument of Perigee 360.0000 Deg
Mean Anomaly 0.0000 Deg
Mean Motion 10.73887722 Rev/Day
Epoch Revolution 0
Semimajor Axis 8678.14 km
Precession 1.3232 Deg West/Day
Period 134.09 Min
Apogee 2301.00 KM 1429.77 SM 1242.44 NM
Perigee 2299.00 KM 1428.53 SM 1241.36 NM
The only element strongly influenced by the launch date and time will be
RAAN. The primary difference is that these predicted elements will show
the satellite passing over your QTH at a different time than when the real
bird will. If you take these elements and "plug" them into your satellite
tracking programs, one of the facinating features that you will discover
about this orbit is that even on a low elevation pass (10 degs or less)
RS-15 is visable for up to 20 minutes! This will make RS-15 an excellent
satellite for Mode A operations. Please stay tuned to the AMSAT News
Service (ANS) bulletins for further information about the launch of RS-15.
[The AMSAT News Service (ANS) would like to thank KE3HP for the
information contained in this bulletin item.]
/EX
SB SAT
AO-13 OPERATIONS NET
HR AMSAT NEWS SERVICE BULLETIN 064.03 FROM AMSAT HQ
SILVER SPRING, MD MARCH 6, 1994
TO ALL RADIO AMATEURS BT
BID: $ANS-064.03
Current AMSAT Operations Net Schedule For AO-13
AMSAT Operations Nets are planned for the following times. Mode-B Nets
are conducted on AO-13 on a downlink frequency of 145.950 MHz. If, at
the start of the OPS Net, the frequency of 145.950 MHz is being used
for a QSO, OPS Net enthusiasts are asked to move to the alternate
frequency of 145.955 MHz.
Date UTC Mode Phs NCS Alt NCS
13-Mar-94 0130 B 075 VE2LVC W9ODI
19-Mar-94 1730 B 073 W5IU WA5ZIB
26-Mar-94 2130 B 084 WA5ZIB W5IU
Any stations with information on current events would be most welcome.
Also, those interested in discussing technical issues or who have questions
about any particular aspect of OSCAR statellite operations, are encouraged
to join the OPS Nets. If neither of the Net Control Stations show up, any
participant is invited to act as the NCS.
AO-13 ZRO Tests For March 1994
The following schedule of Mode "B" tests were chosen for convenient
operating times and favorable squint angles. The tests can be heard on
145.840 MHz. Andy McAlister (WA5ZIB) will conduct all the tests. Mode
"JL" tests will no longer occur due to the failure of AO-13's 70CM trans-
mitter.
Day Date (UTC) Time Areas covered
Saturday Mar. 19, 1994 1930 UTC NA, SA, Europe, Africa
Saturday Mar. 26, 1994 2315 UTC NA, SA
Note that the dates and days are shown in "UTC". Any changes will be
announced as soon as possible via the AMSAT HF and AO-13 Operations
Nets.
All listener reports with date of test and numbers copied should be sent to
Andy MacAllister (WA5ZIB), AMSAT V.P. User Operations, 14714 Knights Way
Drive, Houston, TX 77083-5640. A report will be returned verifying the
level of accurate reception. An S.A.S.E. is appreciated but not required.
/EX
SB SAT
WEEKLY OSCAR STATUS REPORTS
HR AMSAT NEWS SERVICE BULLETIN 064.04 FROM AMSAT HQ
SILVER SPRING, MD MARCH 6, 1994
TO ALL RADIO AMATEURS BT
BID: $ANS-064.04
Weekly OSCAR Status Reports: 06-MAR-94
AO-13: Current Transponder Operating Schedule:
L QST
Mode-B : MA 0 to MA 90 |
Mode-BS : MA 90 to MA 120 |
Mode-S : MA 120 to MA 145 |<- S transponder; B trsp. is OFF
Mode-S : MA 145 to MA 150 |<- S beacon only
Mode-BS : MA 150 to MA 180 | Blon/Blat 180/0
Mode-B : MA 180 to MA 256 |
Omnis : MA 230 to MA 30 | Move to attitude 240/0, Apr 04
[G3RUH/DB2OS/VK5AGR]
FO-20: The following is the current schedule for transponder operations:
ANALOG MODE:
09-MAR-94 7:05 -TO- 16-MAR-94 7:30 UTC
23-MAR-94 7:52 -TO- 30-MAR-94 8:15 UTC
DIGITAL MODE: Unless otherwise noted above.
[Kazu Sakamoto (JJ1WTK) qga02014@niftyserve.or.jp]
The AMSAT NEWS Service (ANS) is looking for volunteers to contribute weekly
OSCAR status reports. If you have a favorite OSCAR which you work on a
regular basis and would like to contribute to this bulletin, please send
your observations to WD0HHU at his CompuServe address of 70524,2272, on
INTERNET at wd0hhu@amsat.org, or to his local packet BBS in the Denver, CO
area, WD0HHU @ W0LJF.#NECO.CO.USA.NOAM. Also, if you find that the current
set of orbital elements are not generating the correct AOS/LOS times at
your QTH, PLEASE INCLUDE THAT INFORMATION AS WELL. The information you
provide will be of value to all OSCAR enthusiasts.
/EX
------------------------------
Date: 1 Mar 94 14:56:48 GMT
From: agate!howland.reston.ans.net!newsserver.jvnc.net!synapse.bms.com!helix!gopstein@ucbvax.berkeley.edu
Subject: GPS information/schematics
To: ham-space@ucsd.edu
In article <2971474522.0.p00926@psilink.com> p00926@psi.com writes:
>Hello netters,
> I'm looking for information/schematics on how to make a GPS reciever.
> It must be fairly simple to make and cost around $10.00 to build. :-)
> Seriously though, I'd like it to be resonable in price. I want to build
> one to use for making maps for orienteering and also to track myself
> on excursions into the deep woods. There is nothing I can't handle
> in the digital world but the world of high frequency analog is kind
> of a mystery. Any help would be greatly appreciated.
>
Forget about building the actual receiver, I don't believe that mere
mortals would have much success -- the GPS signal is extremely
complicated.
You can, however, buy an OEM GPS receiver (mine was a Magellan) and
build a handheld case and display around it. That's what I did. I
used a Motorola 68HC705 microprocessor and a 16x2 LCD display. The
boards use regular asynch serial at normal baud rates for
communications, so interfacing is really easy.
At the time, however, the price of complete handheld units was much
higher than the cost of the receiver boards. That's not really true
any more. The board I bought was about $400, which is in the ballpark
of what you can get complete GPS units for now.
Rich, KD2CQ
--
Rich Gopstein
gopstein@bms.com
rutgers!bms.com!gopstein
------------------------------
Date: 7 Mar 1994 04:47:08 GMT
From: ihnp4.ucsd.edu!sdd.hp.com!hpscit.sc.hp.com!rkarlqu@network.ucsd.edu
Subject: GPS Receiver Boards
To: ham-space@ucsd.edu
The Motorola GPS receiver is less than $150 in 100's. It has six
channels and just about all the features you would ever want.
Rick Karlquist N6RK
rkarlqu@scd.hp.com
------------------------------
Date: 5 Mar 1994 06:21:07 GMT
From: ihnp4.ucsd.edu!usc!yeshua.marcam.com!news.kei.com!eff!news.umbc.edu!haven.umd.edu!umd5.umd.edu!w3eax.umd.edu!ceham@network.ucsd.edu
Subject: Help with FCC Notification fpr SPACE operations ?
To: ham-space@ucsd.edu
Hi, I am trying to find out what exaclty is needed in terms
of an FCC notification for space operations.
We are currently developing an amateur radio experiment / payload
to fly for approximately 48 Hours in a low earth orbit
(space shuttle).
We tried contacting the FCC, but got the run around.
any info would be appreciated in terms of the
notification and STA (if required).
the experiment is basically based on packet radio, and GPS.
will use 2m.
Maurice
ceham@w3eax.umd.edu
------------------------------
Date: 5 Mar 94 18:45:52 GMT
From: nprdc!ihnp4.ucsd.edu!swrinde!cs.utexas.edu!convex!news.utdallas.edu!wupost!simtel.coast.net!msdos-ann-request@network.ucsd.edu
Subject: v2l9331.zip - Hams: Converts raw OSV's to Two-Line Elements
To: ham-space@ucsd.edu
I have uploaded to the SimTel Software Repository (available by anonymous
ftp from the primary mirror site OAK.Oakland.Edu and its mirrors):
pub/msdos/hamradio/
v2l9331.zip Hams: Converts raw OSV's to Two-Line Elements
The Vector to Two-line Elements (VEC2TLE) software provides the user
with the capability to convert position/velocity/time state vectors of
a variety of formats to National Aeronautics and Space Administration
(NASA) Compatible Two-Line Element (TLE) sets. These element sets
contain orbit descriptions compatible for propagation with the
Simplified General Perturbations (SGP) and SGP Version 4 (SGP4) orbit
theories developed for use by the North American Aerospace Defense
Command (NORAD) and United States Space Command (USSPACECOM).
TLEs have become an increasingly-popular source of orbital data. This
is due mainly to the fact that this format of data is available for
nearly all Earth-orbiting satellites. As a result, the popular
satellite tracking software packages such as STSPLUS and TRAKSAT, use
TLEs as their primary sources of input data along with the SGP4 orbit
propagator.
TLE data is available for most Earth-orbiting satellites from several
sources (see Appendix F). VEC2TLE is not intended to replace these
as primary sources of TLE data. Rather, its primary purpose is for
circumstances in which this data may not be available in a timely
fashion. A prime example is the Space Transportation System (STS) where
position and velocity state vectors may be the only orbital information
available in near real time. In the past, users of the tracking
software had little choice but to wait (hours) until the TLE data was
available following thruster firings that changed the Shuttle's orbit.
It is this situation that resulted in the creation of VEC2TLE. The
TLEs computed by VEC2TLE are fully compatible with SGP or SGP4 as true
and accurate renditions of the orbit specified by the input state
vectors.
Uploaded on behalf of the author.
Michael Dabrowski KD6KMF
astroman@netcom.com
------------------------------
Date: (null)
From: (null)
To date, the group have this members:
Engineers:
RAUL BON FOSTER, LU5ALG
JUAN CARLOS LUCIANI, LU4AGC
JULIO BIANCHI, LW1DUA
CLAUDIO MARCO ZANELLA, LU4AEY
Technicians:
NORBERTO PENINNI, LU8DYF (LUSAT-1 Control Station)
JUAN CLEMENTE, LU8ENU
OMAR CASTRO, LU5EO
Inventors:
EDUARDO SWEET BIRO, LU7AKC
Director:
MARIO IBERTIS RIVERA, LU2BDT
These ones will manage some experiment teams.
You can contact us via Internet, sending a message to
<graps@asarin.org.ar>
or via Packet radio, sending a PERSONAL message to
graps@lu7akc.#col.cf.arg.soam
or via Fax to
(+54-1) 552-1920 (ask for fax)
or via Voice phone to
(+54-1) 642-1664
NOTE: Please post this message over any net or list.
Sincerely yours, Eduardo Sweet Biro. (February 17, 1994)
------------------------------
End of Ham-Space Digest V94 #50
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