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- Subject: UO-22 Report 12 (Image List)
- To: Info Services <is@tomcat.gsfc.nasa.gov>
- Date: Mon, 29 Jul 91 19:34:34 BST
- X-Mailer: ELM [version 2.3 PL11]
- From: uunet!ee.surrey.ac.uk!J.W.Ward
- Message-Id: <9107291934.aa28787@Ainur.EE.Surrey.Ac.UK>
-
-
- UOSAT-OSCAR-22 Report (12)
- 17:30 UTC 29 July 1991
-
- We have now completed the initial phase of UoSAT-OSCAR-22's commissioning (and
- also a successful AMSAT-UK Colloquium at UoS). All of UO-22's subsystems have
- been exercised and are working. Although we have been preoccupied by the CCD
- camera, we have also checked the horizon sensors and total radiation dose
- experiment during the last few days.
-
- With the commissioning complete and several good CCD images in the RAMDISK, we
- will now "open" the UO-22 uplink to amateur stations. As stated in previous
- releases, UO-22 is primarily a data downlinking satellite, not a BBS
- communications satellite. We expect that most stations using UO-22 will be
- downloading raw CCD images using the PACSAT Broadcast Protocol. Since we don't
- intend to support BBS operations, only the Broadcast Protocol server will be
- available, not the FTL0 file server. Of course, without the FTL0 server, there
- is no way for you to get a directory of files on the satellite, and you are
- working 'blind'. We will solve this problem in the near future with a
- broadcast directory. In the mean time, please check UO-14 for a list of recent
- picture files, or capture whatever UO-22 file we have placed on long
- broadcast. Please do not "go fishing" by trying to broadcast every file on the
- satellite. A list of interesting files is included in this release.
-
- The UO-22 picture files are more than 300 kbytes long. In our experience, you
- can easily receive one of these files in a pass. We would suggest, however
- that stations resist the temptation to Begin broadcasts. If several stations
- in the footprint Begin broadcast of the same 300 kbyte file, the broadcast
- protocol will work inefficiently, and a lot of repeated data will be sent on
- the downlink. Use the Broadcast Protocol in its most efficient mode: Grab or
- Capture for a couple of passes, then request hole fills to get the parts of
- the picture which you have missed. This will result in the best performance
- for everyone. We will all have a lot to learn about Broadcast operation with
- such large files.
-
- The OBC186 and Transputer CCD support programs on the satellite are still
- being debugged, so not all of the pictures we take will have the "nominal"
- data format. In particular, there are sometimes 254-byte blocks repeated at
- places in the raw picture files. If you are happy working your way through
- such problems, then by all means do so. If you prefer to get your images after
- they've been cleaned up, then wait for GIF files to be uploaded to UO-14. Some
- custom utilities and shareware programs for doing your own GIF conversions
- will be placed on UO-14 soon.
-
- 73,
-
- Jeff Ward, G0/K8KA
-
-
- I = rotate image 180 degrees for best orientation
- r = image contains some repeated 254-byte data packets
-
- FILE # DATE TIME LAT LON SCENE
- --------- ------------- ------------ ---- ----- ---------------
- CCD0 (30) SAT 20 JUL 91 22:22:00 UTC 68.4oN 155.7oW ALASKA ?
- CCD1 (33) SUN 21 JUL 91 10:12:25 UTC 40.4oN 11.8oE ITALY + GREECE
- CCD0A (30) MON 22 JUL 91 21:24:00 UTC 34.1oN 156.9oW HAWAII ?
- [The above files are no longer on the satellite. Overwritten.]
-
- CCD1A (33) TUE 23 JUL 91 07:25:00 UTC 26.8oN 50.6oE PERSIAN GULF (I)
- CCD2A (39) TUE 23 JUL 91 10:52:00 UTC 4.2oN 4.8oE EQUATORIAL AFRICA
- CCD3 (8f) TUE 23 JUL 91 14:12:00 UTC 6.5oN 54.4oW FRENCH GUYANA (I,r)
- CCD4 (93) WED 24 JUL 91 08:29:00 UTC 29.7oN 35.2oE SINAI + NILE VALLEY (I)
- CCD5 (97) WED 24 JUL 91 16:50:15 UTC 30.9oN 89.8oW FLORIDA + M'IPI DELTA (r)
- CCD6 (9D) THU 25 JUL 91 09:31:02 UTC 39.4oN 21.9oE BALKANS (I)
- CCD7 (A0) THU 25 JUL 91 17:53:14 UTC 37.2oN 104.2oW DENVER ? (r)
- CCD8 (a5) FRI 26 JUL 91 02:15:30 UTC 34.8oN 129.7oE KOREA (I)
- CCD9 (a9) FRI 26 JUL 91 15:43:00 UTC 17.2oN 75.5oW CUBA + HAITI (I)
- CCD10 (aa) FRI 26 JUL 91 18:59:15 UTC 32.8oN 121.7oW CALIFORNIA (I)
- CCD11 (b1) SAT 27 JUL 91 16:40:30 UTC 42.8oN 84.5oW GREAT LAKES (r)
- CCD12 (b6) SUN 28 JUL 91 08:05:00 UTC 34.0oN 30.5oE EASTERN SOUTH AFRICA (I)
- CCD13 (b8) SUN 28 JUL 91 11:55:00 UTC 36.9oN 3.2oW SPAIN + MAHGREB (I,r)
- CCD14 (bd) MON 29 JUL 91 10:25:95 UTC DENMARK + NETHERLANDS (I)
- CCD15 (be) MON 29 JUL 91 12:06:05 UTC Ireland
-
-
-