June 2015 - AMSAT-BB - mailman.amsat.org

Report PSAT-1
by Pablo J.M. - LW8EXS 08 Jun '15

08 Jun '15

Jun 8, 2015 16:34 UTC 145.825 fm 2:Fm PSAT To APRSON Via ARISS [13:34:25R] T#874,839,070,125,126,408,00000000 73s de LW8EXS Mercedes ( Buenos Aires ) Argentina

1 0

PSAT digipeater reception 2015-06-08 1430 UTC
by John Brier 08 Jun '15

08 Jun '15

Hi all, I received PSAT for the first time today. I had just done an SO-50 pass and saw that PSAT would be in range in about 30 minutes so I stuck around to try and receive it. It seemed surprisingly strong considering it is supposed to only be putting out 350 mw. I recorded audio of the pass and just now tried to decode it with UZ7HO's Soundmodem for Windows, which I have used to decode the ISS digipeater. Unfortunately, I am only able to decode two packets out of the numerous transmissions which, to me, seem strong enough to decode. This is a problem I've had with the ISS as well but it never seemed this bad. Are there some special settings I need to change in Soundmodem to decode the packets from PSAT? For example, I only see APRS packets, no satellite beacon data, shouldn't I see that too? Here is what I got 1:Fm N3FCX To S9UT2R Via PSAT*,ARISS* <UI R Pid=F0 Len=25> [11:37:00R] 'g.7l #/]ANT TELE WAVE= 1:Fm K1WY To TQTU7U Via PSAT*,ARISS* <UI R Pid=F0 Len=28> [11:37:56R] 'dGvl -/]WEST HARTFORD CT= (time stamps are wrong because I didn't decode it live) Here is an mp3 of the audio recording if you want to try and decode it yourself. http://cupcakecarnival.net/sites/default/files/PSAT-2015-06-08-1430-Crossro… John Brier, KG4AKV, FM05 (Raleigh/Cary, NC)

1 0

Re: [amsat-bb] PSAT Pass
by Nicholas Mahr 08 Jun '15

08 Jun '15

Tryed the pass after the last one at 14:28 UTC over US, I managed to digipeat sevreal packets through it, and heard quite a few people get through as well, Sometimes its a challenge to get through it.. For some reason I cannot hear the PSK31 very well, I mean im using a pre-amp and a circular polarised antenna L/R, I was seeing bob said a yagi, will that make a diffrence? I'd like to hear users and try to decode the PSK31 tlm aswell. But anyways more telemetry :-)! Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=52 >[10:28:23] s#018329,0z200,DjBDjADj0Dj0DjaDjaDjaCjaCjbCjbCibBib Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[10:28:33] T#750,842,071,130,132,416,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=38 >[10:29:06] :BLN2USA :See APRS.FI & 144.39 users Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[10:29:34] T#751,843,071,130,131,416,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=52 >[10:29:53] s#018330,0z200,BibBibBibAicAicAicAicAicAicAicAicAid Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[10:30:35] T#752,845,070,130,131,416,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[10:36:40] T#758,850,074,130,129,416,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[10:37:41] T#759,869,074,130,129,416,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=52 >[10:37:42] s#018335,0z200,FAfFAfGAfG0fG0fG0fGAfGAfGAeGAfGBeGBe Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=52 >[10:39:13] s#018336,0z200,GBeGBeFCeFCeFDdFDdFDdFDcFDaEE0EE0FEA Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[10:39:43] T#761,877,071,130,129,415,00000000

1 0

PSAT
by Nicholas Mahr 08 Jun '15

08 Jun '15

Hello Nick, According to my telemetry the digipeater is ON, and according to bob the digipeater and PSK transponder are both ON. 73 KE8AKW NICK

1 0

PSAT Pass
by Nicholas Mahr 08 Jun '15

08 Jun '15

Hello all, I tryed out the pass on APRS about 12:50 UTC today. Very very strong satellite 57! Could not digepeat a packet for some reason. I think i was a little confused about the paths, what are the paths for to and via? Im using UISS. Got many frames of Telemetry this pass as well! Also bob you should at PSAT to oscar.dcarr for recepetion reports. I noticed very few people got digpeated... Also bob the frames that have all the numbers in them, what do they mean, are the just noisy tlm frames? Also for all the people out that wanted to know what their frame of telemetry means here you go: PSAT Beacon specification: CALL beacon MODE NOF DET AGC VC IC TMP Where: CALLidentification of the beacon (callsign)beaconkeyword indicating beginning of dataMODEA or B (A – transmitter always on, B – transmitter turns on, if BPSK31 signal is present)NOFnumber of frame (0 … 999)DETpercentage of BPSK31 detection (0 … 99%)AGCpercentage of AGC operation (0 … 99%)VCsupply voltage (10 mVolts)ICpower amplifier current (mAmps)TMPtemperature of PA transistor (deg C) The AGC measured voltage is highly nonlinearly dependent on the input signal, morover the limiting values of measurement vary with temperature of the chip and its supply voltage. Indicative only conversion equation was computed as from 50Ohm generator to input of receiver Pin = 0.472xAGC-113.5 [dBm, %] Example: W3ADO-5 beacon B 044 03 24 540 198 +28 It means mode B active, frame number 044, BPSK31 03 %, AGC acting 24%, supply voltage 5.40V, PA current 198mA ant temperature of the PA transistor of +28°C. Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=52 >[08:47:54] s#018259,0z200,jkIjkHjkGjkFikFikDikAhkahkbgkbgkcgkd Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[08:48:03] T#651,842,074,130,132,415,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=52 >[08:49:26] s#018260,0z200,dkdckebkeake0kf0kf0kf0kf0kf0jf0kg0kf Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=52 >[08:50:56] s#018261,0z200,bkgbjgcjfgjfhjghjfhjfhifhifiifiifiif Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[08:51:06] T#654,856,071,131,131,415,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[08:53:08] T#656,855,071,131,130,415,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[08:54:09] T#657,872,079,131,130,416,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=52 >[08:55:28] s#018264,0z200,D0hD0hDAhDAgDBgCBgCCgCCgCCgCDgCDgBDg Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=52 >[08:57:00] s#018265,0z200,BDgBDfBEfBEfBEfBEfBEfBEeBFeBFeCFeCFe Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[08:57:12] T#660,865,092,131,129,415,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[08:58:12] T#661,881,078,131,129,415,00000000 Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=52 >[08:58:37] s#018266,0z200,DFfDFfDGeEGfEGfEGfEGfFGfEFfFFeEFeFFe Fm PSAT To APRSON Via ARISS <UI pid=F0 Len=34 >[08:59:13] T#662,841,368,130,129,415,00000000

1 1

PSAT
by Nick Pugh K5QXJ 08 Jun '15

08 Jun '15

What mode was PSAT in yesterday AM? Thanks nick Office 337 593 8700 Cell 337 258 2527 Helping UL become a world Class Engineering and Educational School Disagree I Learn

1 0

Re: [amsat-bb] Lightsail Back On
by Mineo Wakita 08 Jun '15

08 Jun '15

LightSail-A, ULTRASat7 90726 16:01-16:15 UTC, 7 Jun 2015, Ele 29 S-E-EN, 437.4345MHz 9600bps FSK 1:Fm KK6HIT-1 To N6CP-X <UI R Pid=CC Len=248> [01:06:13R] [IP] Fm 129.65.147.33 To 129.65.147.36 prot=UDP ttl=64 len=248 [UDP] src_port:50000 dest_port:50800 len=228 data=220 1:Fm KK6HIT-1 To N6CP-X <UI R Pid=CC Len=248> [01:07:28R] [IP] Fm 129.65.147.33 To 129.65.147.36 prot=UDP ttl=64 len=248 [UDP] src_port:50000 dest_port:50800 len=228 data=220 1:Fm KK6HIT-1 To N6CP-X <UI R Pid=CC Len=248> [01:07:58R] [IP] Fm 129.65.147.33 To 129.65.147.36 prot=UDP ttl=64 len=248 [UDP] src_port:50000 dest_port:50800 len=228 data=220 JE9PEL, Mineo Wakita

1 0

Lightsail Back On
by B J 07 Jun '15

07 Jun '15

http://www.planetary.org/blogs/jason-davis/2015/20150506-lightsail-wakes-se… 73s Bernhard VA6BMJ @ DO33FL

3 3

PSAT Doppler Science Project
by Robert Bruninga 07 Jun '15

07 Jun '15

> I was able to copy Psat 435 mhz downlink today...nice ! > Watching the stations move diagonally across the waterfall > was an interesting Display of the Doppler on the uplink. Yes, and you can draw that Doppler curve and from the rate of change you can calculate that stations position! That was the basis for all Early Satellite Positioning systems and most of the early EPRB Emergency Locator beacons. It woiuld be a great science project for kids to plot the doppper and see if they can figure out the position of a station! When authors start upgrading PSK31 programs so that they are fdull duplex and can AFC their own uplink, then none of the satellite user signals will slew, but since we chose the same uplink as normal terrestrial PSK31 users, those signals can plot a nice Doppler curve. The only problem there is that they turn their transmitters on and off, but usually stay on the same 10m frequency, so that means although their signals are disjoint, their emissions should all be on their theoretical Doppler curve and therefore can be located. Actually, on just one pass all you can get is a line of position relative to the satelites track, But on two passes, then you can have two lines of position and where they intersect is the stations position. Good luck! Maybe someone has the time to search for a good reference for the technique. Bob, Wb4APR US Naval Academy

2 1

Report RX PSAT-1
by Pablo J.M. - LW8EXS 07 Jun '15

07 Jun '15

Report RX: Sun, 7 Jun 2015 20:02 UTC 2:Fm PSAT To APRSON Via ARISS <UI R Pid=F0 Len=34> [17:02:06R] T#660,829,350,124,126,406,00000000 LW8EXS, Pablo Mercedes ( Buenos Aires ) Argentina

1 0