[amsat-bb] Alsat-1N (Pratham ) - Update

Wed Sep 28 16:54:27 UTC 2016

Hi Bob,

Use the UZ7HO hs_soundmoden and un-tick non-ax25 filter.

Similar to STRaND-1 ALSAT-1N it is not full AX25

Regarding PRATHAM, it should do CW on 145.98 during the whole orbit and 
AFSK 1200 on 437.455 over there command stations.

But so far nothing heard

73 Jan PE0SAT

On 28-09-2016 18:47, KO6TZ Bob wrote:
> Correct me if I am mistaken;
> 
> Pratham and AlSat-1N are two different satellites.  Pratham is turned
> on only over India and Europe, and AlSat-1N has a 90 second telemetry
> beacon 437.650 9K6 FSK.  (actually running 4KHz low 437.646)
> 
> I have only been able to copy garbled data from AlSat-1n the last 
> three days.
> 
> BOB
> KO6TZ
> 
> 28 Sept 2016   UTC <<<<<<<<<<<<<<<<<<
> 
> 16:22 -14>>I03,?,97 (9600 baud):
> .ì.
> 16:22 -4>>I02,?,36 (9600 baud):
> ..H c...„èxW....
> 16:22 -9>>UI,?,20 (9600 baud):
> ‚.æO
> 16:22 -4>>I02,?,36 (9600 baud):
> ... ....„èxW....
> 16:22 -11>>I00,?,90 (9602 baud):
> .ì.
> 16:22 -4>>RNR0,?
> 16:23 -4>>UNKN,?
> 16:23 -4>>I27,?,36 (9600 baud):
> ..H R...ÞèxW....
> 16:23 -7>>DM,R
> 16:23 -4>>UNKN,?
> 16:23 -9>>UNKN,?
> 16:25 -4>>I54,?,36 (9598 baud):
> ..H }...8éxW....
> 16:25 -4>>I54,?,36 (9600 baud):
> ..H }...8éxW....
> 16:26 -7>>I03,?,97 (9602 baud):
> .í.
> 16:26 -4>>RR0,?
> 16:26 -4>>I01,?,37 (9600 baud):
> ..? G...’éxW....
> 
> 
> 
> 
> 
> 
> Hello Ken & everyone.
> 
> Hoping to confirm Ken's possible Pratham CW beacon reception, I was
> tracking Pratham on a max 56° pass down the USA East Coast at 14:46 
> UTC
> today.
> 
> No signal was seen where it "should" have been, but a strong and clear 
> CW
> beacon appeared below the expected frequency.
> 
> Replay of the recording with appropriate demod revealed that the CW in
> question translated to "M O V E 1".
> 
> A Google search lead me to object 39439, cubesat "First Move" which
> transmits the MOVE1 CW beacon on 145.970.
> 
> Adding that satellite to Orbitron and walking back to the time of my 
> pass,
> the First Move satellite was indeed in the area (trailing the expected
> track of Pratham).
> 
> Running the simulation back to Ken's reception report at 09:45 UTC, 
> First
> Move was also in his area.  And, according to the footprint in 
> Orbitron,
> First Move would have just been in range of the UK - in fact very 
> close if
> the time was closer to 09:50 UTC.
> 
> I don't know if this is the CW that Ken might have heard, but in any 
> event
> I unfortunately did not see any transmissions around 145.980 on this
> morning's pass here that might correlate to Pratham.
> 
> -Scott,  K4KDR
> Montpelier, VA  USA
> 
> =================================
> 
> On Wed, Sep 28, 2016 at 9:31 AM, GW1FKY--- via AMSAT-BB <amsat-bb at 
> amsat.org>
> wrote:
> 
>> Hi again,
>> I listened for Alsat-1N ( Pratham ) on the subsequent pass -same 
>> frequency
>> and equipment but also with an update to the keps. Those issued on 
>> the  BBS
>> posting.
>> I regret to inform you that I heard nothing ?    The pass was lower 
>> and in
>> a sector were I have difficulty
>> due to screening and reflection problems - Weather had also changed 
>> with
>> very low cloud,mist and rain.
>> Even AO-73 would not decode the dashboard data in the same sector 
>> during
>> the same period.
>> 
>> I am certain about hearing a CW  beacon in the previous  pass.
>> I had been setting up my gear for an AO-73 in that earlier pass and 
>> had USB
>>  selected for the downlink data.
>> 
>> Noticed that Alsat-1N  was also approaching in the same ball part of  
>> time
>> so decided to have a listen on the
>> 145.980 Mhz frequency.    That was when I started to hear  the CW 
>> beacon
>> but still had USB selected I selected CW and got a better copy as  it
>> approached.
>> I wish that I been set up to record but of course was not planning 
>> for that
>>  particular satellite and pass.
>> Had I done so it would have been useful to clarify any doubt about 
>> things
>> and I am unsure why the subsequent pass showed no activity.
>> Hopefully the satellite is alive and active and someone else also 
>> monitored
>>  and maybe even recorded the pass.
>> Ken Eaton
>> GW1FKY
>> 
>> 
> 
> 
> 
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