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UA9FBV > SAT 20.01.03 02:06l 101 Lines 3129 Bytes #999 (0) @ AMSAT
BID : ANS-019.03
Read: DB0FHN GUEST
Subj: AO-49 Uplink Test
Path: DB0FHN<DB0RGB<OK0PPL<RZ6HXA<UA9FBV
Sent: 030120/0007Z @:UA9FBV.PRM.RUS.AS #:25926 [Perm] FBB7.00i $:ANS-019.03
From: UA9FBV@UA9FBV.PRM.RUS.AS
To : SAT@AMSAT
AMSAT News Service Bulletin 019.03 From AMSAT HQ
Silver Spring, MD. January 19, 2002
To All Radio Amateurs
BID: $ANS-019.03
The team of SAFIR-M (AATiS OSCAR-49) invites you to
participate in a test of the uplink conditions for AO-49 SAFIR-M.
To get more information about the behavior of AO-49 SAFIR-M
stations are requested to attempt uplinking at various power levels. Uplink
results can be viewed by monitoring the onboard implemented MH0 and MH1
reports of the SAFIR-M.
At the moment, there is still one known problem in the down-
linked data of the messages (bit0 is fixed to "0"). A SW upload
for correction is planned but will still need some time of
preparation.
The SAFIR-M digipeating functionality is not affected by this
fault and can be monitored with every 2m 9k6 equipment!
Details about possibilities to receive and even decode the
data are described at the following links:
http://hft.fh-pforzheim.de/ao49/
http://www.ne.jp/asahi/hamradio/je9pel/safir-m2.htm
The onboard implemented MH0 and MH1 list (normally) looks
as follows:
[001: DP0AIS > MH0 UI^]
MH/RSSI min max sec
DG6BCE-00 -070 -070 0006
DG6BCE-04 -070 -070 0023
DG6BCE-03 -070 -070 0052
DG6BCE-03 -070 -070 0076
DG6BCE-02 -120 -117 0109
DG6BCE-01 -120 -117 0133
DG6BCE-01 -120 -117 0155
xxxxxx-00 -120 -120 1121
[001: DP0AIS > MH1 UI^]
MH/RSSI min max sec
xxxxxx-00 -120 -120 1121
xxxxxx-00 -120 -120 1121
xxxxxx-00 -120 -120 1121
xxxxxx-00 -120 -120 1121
xxxxxx-00 -120 -120 1121
xxxxxx-00 -120 -120 1121
xxxxxx-00 -120 -120 1121
xxxxxx-00 -120 -120 1121
Description:
The used Call and SSID of the last 2 x 8 received messages are
displayed with the related min and max RX power within this
message in dBm and the elapsed time in seconds.
Note: Only messages with destination "DP0AIS" will be listed
here.
This feature was implemented to allow a simple check of the
used ground station equipment and shall allow a couple of
more experiments...
The uplink equipment could be quite simple: even a transmitter for
435,275 MHz, up to 30 W of TX-power, antenna, 1k2 AFSK modem/TNC.
To verify this functionality, we request the usage of SAFIR-M
digipeating function
* with different uplink power
* with / without correction of the doppler shift
And reports, containing
* day / Time in UTC
* station location
* rig description (antennas, powers, gains/losses)
* used uplink power
* used Uplink-QRG
It is helpful to include some of this information in the
transmitted data packet as shown in the following example:
DK2SM>DP0AIS: JO42rl 80W 430269 kHz
DK2SM>DP0AIS: JO42rl 25W 430279 kHz
The actual TLEs are available on the CELESTRAK database under
TLE-NEW and "RUBIN 2" with the NORAD #27605.
We kindly request to provide us with monitored SAFIR-M
beacon messages and reports of uplink experiments so that
we can analyze this feature.
For any questions please do not hesitate to contact us.
Please address any reports to DG6BCE@aatis.de
[ANS thanks Oliver, DG6BCE, for the above information]
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