sfn20715@uxa.cso.uiuc.edu (07/20/89)
Would someone please be kind enough to post or repost a list of the frequencies used by Shuttle/KSC/Remote stations communications during Shuttle flight? Please mail to sfn20715@uxa.cso.uiuc.edu or post in sci.space or sci.space.shuttle. Bolshoi spaceba, tovarischi.
qac@occrsh.ATT.COM (Quentin_Conner) (07/25/89)
sfn20715@uxa.cso.uiuc.edu writes: >Would someone please be kind enough to post or repost a list of the frequencies >used by Shuttle/KSC/Remote stations communications during Shuttle flight? >Please mail to sfn20715@uxa.cso.uiuc.edu or post in sci.space or >sci.space.shuttle. Bolshoi spaceba, tovarischi. Yes, please do. Quentin Conner -------------- qac@occrsh.att.com
bobt@pogo.WV.TEK.COM (Bob Tidrick) (07/27/89)
This was saved from the net maybee two years ago. I don't know if they are
still current but I can't see why they would not be.
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The shuttle comm frequencies are public information. From my Rockwell
STS-1 press kit, the three UHF AM frequencies are: 296.8 (primary),
259.7 (secondary), and 243.0 Mhz (emergency).
The S-band frequencies are:
2287.5 Mhz (PM downlink - primary)
2217.5 Mhz (PM downlink - secondary)
2250.0 Mhz (FM downlink - primary)
2205.0 Mhz (FM downlink - development flight instrumentation)
2106.4 Mhz (PM uplink - primary)
2041.9 Mhz (PM uplink - secondary)
1831.8 Mhz (PM uplink - DoD primary)
1775.7 Mhz (PM uplink - DoD secondary)
As Ron said earlier, the data stream is multiplexed stuff with digital
voice and telemetry. However, all of the data formats are also public
information. I have a NTIS report on the performance of the
communications system during the STS-2 ascent, and in an appendix are
complete details on everything you need - frame sync vectors, channel
assignments, etc. In addition to the digital data, the PM downlinks
repeat a 1.7 Mhz ranging tone. For the non-DoD uplinks, the carrier
frequency of the downlink transmitter is phase locked to 240/221 times
the uplink frequency, also for tracking. While certainly challenging, this
is not outside of the capabilities of a dedicated amateur.
The FM downlinks can carry a variety of stuff, e.g., television [probably
analog], 128 kb/s real-time engine data or 192 kb/s playbacks of
recorded data.
Phil
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From the Files of
Bob Tidrick
GPID Engineering
Tektronix Inc.
Wilsonville OR. smb@ulysses.homer.nj.att.com (Steven M. Bellovin) (07/27/89)
Of course, this is a classified shuttle flight, so don't expect to hear anything in cleartext. They're not even going to tell us the launch time till T-9:00, though that doesn't make much sense to me -- I'm sure all the "fishing trawlers" can turn on their sensors given that much lead time anyway...
phil@delta.eecs.nwu.edu (Bill LeFebvre) (07/27/89)
In article <7651@pogo.WV.TEK.COM> bobt@pogo.WV.TEK.COM (Bob Tidrick) writes: >The S-band frequencies are: >... >For the non-DoD uplinks, the carrier >frequency of the downlink transmitter is phase locked to 240/221 times >the uplink frequency, also for tracking. While certainly challenging, this >is not outside of the capabilities of a dedicated amateur. As someone has pointed out, the next flight (as well as the one after it) are DoD: both uplink and downlink will be encrypted. Furthermore, they just recently decided to encrypt ALL uplink, even on the non-DoD. I don't know when they implemented this decision (whether it was on or after STS-26), but I know it happened. It is now beyond "the capabilities of a dedicated amateur", although probably not impossible. I think it was a smart move. Downlink for non-DoD flights remains unencrypted. William LeFebvre Department of Electrical Engineering and Computer Science Northwestern University <phil@eecs.nwu.edu>
leem@jpl-devvax.JPL.NASA.GOV (Lee Mellinger) (07/28/89)
In article <957@accuvax.nwu.edu> phil@delta.eecs.nwu.edu (Bill LeFebvre) writes: :In article <7651@pogo.WV.TEK.COM> bobt@pogo.WV.TEK.COM (Bob Tidrick) writes: : :As someone has pointed out, the next flight (as well as the one :after it) are DoD: both uplink and downlink will be encrypted. : : William LeFebvre The next flight is indeed a DOD launch, however the one following is the Galileo launch and definitely not classified. Lee "I'm the NRA" "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -- Benjamin Franklin 1759 |Lee F. Mellinger Caltech/Jet Propulsion Laboratory - NASA |4800 Oak Grove Drive, Pasadena, CA 91109 818/393-0516 FTS 977-0516 |{ames!cit-vax,}!elroy!jpl-devvax!leem leem@jpl-devvax.JPL.NASA.GOV
phil@delta.eecs.nwu.edu (Bill LeFebvre) (07/28/89)
In article <5459@jpl-devvax.JPL.NASA.GOV> leem@jpl-devvax.JPL.NASA.GOV (Lee Mellinger) writes: >The next flight is indeed a DOD launch, however the one following is >the Galileo launch and definitely not classified. Entirely possible. At one time there were two DoD missions scheduled for this summer, thus my confusion. Since my wife isn't working there any longer, this list is the best source of current information that I have. My apologies for any misinformation. William LeFebvre Department of Electrical Engineering and Computer Science Northwestern University <phil@eecs.nwu.edu>
cmaidt@f9.n147.z1.FIDONET.ORG (Chris Maidt) (07/31/89)
BT> ----------------------------------------------------------------------- BT> BT> The shuttle comm frequencies are public information. From my Rockwell BT> STS-1 press kit, the three UHF AM frequencies are: 296.8 (primary), BT> 259.7 (secondary), and 243.0 Mhz (emergency). These are current: SHUTTLE MISSION FREQUENCIES AERONAUTICAL FREQUENCIES VHF/UHF IN MHz KSC PATRICK AFB EDWARDS AFB 117.8 118.4 116.4 121.7 121.7 120.7 126.2 125.1 121.8 126.3 126.2 126.1 284.0 128.7 127.8 138.3 236.6 138.450 269.9 149.925 290.3 162.6120 318.1 273.5 390.1 335.8 340.9 348.4 358.3 --------------------------------------------------------------------------- KSC GROUND SUPPORT VHF IN MHz 148.480 163.510 170.350 149.170 163.560 171.150 162.610 165.190 171.260 163.460 170.150 173.560 163.480 170.170 173.680 --------------------------------------------------------------------------- S BAND MICROWAVE IN MHz SHUTTLE TO GROUND 2205.0 2217.5 2250.0 2287.5 GROUND TO SHUTTLE 2041.9 2201.4 --------------------------------------------------------------------------- SHORTWAVE FREQUENCIES IN KHz 2622 6693 9042 13277 2678 6708 9132 13600 3850 7461 10780* 14397 3860 7675 11205 14896 5180 7910 11407 20186 5190 8972 12160 20197 5350 8981 12277 20198 5810 7765 13170 20390** ALL FREQUENCIES ARE IN UPPER SIDEBAND * PRIMARY FREQUENCY ** SECONDARY FREQUENCY THESE FREQUENCIES HAVE NOT BEEN CHECKED BY ME jt of dc cm -- Chris Maidt - via FidoNet node 1:147/10 UUCP: ...!att!occrsh!uokmax!metnet!9!cmaidt INTERNET: cmaidt@f9.n147.z1.FIDONET.ORG
karn@ka9q.bellcore.com (Phil Karn) (08/09/89)
During powered flight about 6 to 7 minutes after launch, I heard three very brief air-to-ground transmissions on the standard Shuttle UHF AM frequencies. They were clearly the Shuttle, since they began "Houston, Columbia..." The receiver was an Icom R-7000 fed by a broadband discone antenna up about 40 feet. Given that I am near New York, these observations confirm the high inclination orbit. Anybody have a set of Keplerian elements yet? Phil
gordon@prls.UUCP (Gordon Vickers) (08/09/89)
In article <17361@bellcore.bellcore.com> karn@ka9q.bellcore.com (Phil Karn) writes:
->
->During powered flight about 6 to 7 minutes after launch, I heard three very
->brief air-to-ground transmissions on the standard Shuttle UHF AM
Geeesh, you forgot to mention the frequancy :-)
->frequencies. They were clearly the Shuttle, since they began "Houston,
->Columbia..." The receiver was an Icom R-7000 fed by a broadband discone
->antenna up about 40 feet.
->
{remainder deleted - gpv}
->Philtom@dvnspc1.Dev.Unisys.COM (Tom Albrecht) (08/12/89)
In article <17361@bellcore.bellcore.com>, karn@ka9q.bellcore.com (Phil Karn) writes: > > Given that I am near New York, these observations confirm the high > inclination orbit. Anybody have a set of Keplerian elements yet? > > Phil I pulled the following off the Celestial RCP/M system. Sb: ACTUAL STS 28 ELSET <Satellites> Fm: TED MOLCZAN To: ALL #: 4952 05:49:42 09-Aug-89 The following elset was received from a friend. The origin is offical. 20164 89061A 89220.55325462 00084253 57.0005 46.3102 0012736 291.1181 241.7481 15.91332191 This was rev 0 by NORAD's count, and rev 1 by NASA's. Orbit is 297 km x 314 km, with 90.49 min period. STS 27 was 57 deg inc, 451 km by 458 km, with 93.53 min period. Therefore it appears that STS 28 is on a different mission, i.e. not Lacrosse. KH-11 type payload would be consistent with low orbit of STS 28. Visibility prospects in N.A. not good. Southern U.S. latitudes may have low pre-dawn passes on final day or two of mission. BFN Sb: LATEST STS 28 ELSET. <Satellites> Fm: TED MOLCZAN To: ALL #: 4953 16:29:14 09-Aug-89 Received this morning : 89221.10520486 .00078617 00000+00 25599-3 005 56.9981 43.7612 0008896 307.8287 146.2817 15.90071905 Above is at start of NORAD's rev 9 and NASA's rev 10. BFN -- Tom Albrecht