[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

AO-49 / Invitation to Participation in Uplink test



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 behaviour of AO-49 SAFIR-M
we kindly ask for tests with different uplink powers. By the
use of the onbord implemented MH0 and MH1 reports of the SAFIR-M
a test result is also direct available for the user.

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 discribed at the following links:

http://hft.fh-pforzheim.de/ao49/
http://www.ne.jp/asahi/hamradio/je9pel/safir-m2.htm


The onbord implemented MH0 and MH1 list (normaly) 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" wil 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 these information in the
transmitted data packet as showed in the 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 analyse this feature.

For any questions please do not hesitate to contact us.

Please address any reports to    DG6BCE@aatis.de

tnx & 73 de Oliver, DG6BCE

------------------------------------------------------
Mailto:                DG6BCE@aatis.de
AATiS-Homepage:        http://www.aatis.de
SAFIR-M homepage:      http://amend.gmxhome.de
SAFIR-M Operational:   http://hft.fh-pforzheim.de/AO49
Mineo Wakita / JE9PEL: http://www.ne.jp/asahi/hamradio/je9pel/safir-m2.htm
------------------------------------------------------
----
Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home