April 2017 - AMSAT-BB - mailman.amsat.org

W5PFG/p DM83/93 line tonight April 3, 2017
by Clayton Coleman 03 Apr '17

03 Apr '17

I'll work the following passes tonight from the DM83/93 line in West Texas: 0243 AO-73 0253 EO-88 0319 SO-50 All times UTC. 73 Clayton W5PFG

1 0

Community Survey Request -- crosslinks, multi-hop packet, and satellite DX
by Zach Leffke 03 Apr '17

03 Apr '17

Hello fellow satellite nuts! This email is to humbly request the opinions of those in the Amateur Satellite Community about the idea of setting new satellite DX records. Nothing formal, you can email on list or off list as you think appropriate. So here is the idea: What if there were a constellation of three satellites (3 1Us), built by students (undergrads) at three different universities, but launched together and deployed from the same deployer that had crosslink packet communications built into the design. Then, what if those birds were licensed via the Amateur Radio route (instead of Experimental as is the norm for most University birds, with some notable exceptions of course) allowing the entire global amateur satellite community to use the crosslink capability in an attempt to set new satellite DX records? Now, there is a primary science mission (pseudo-range determination as the constellation separates, different mass and drag profiles for each bird) so during the work week, science happens, but on the weekends, the constellation is made available to the community for crosslink packet comms. Additionally, if your setup has enough G/T to monitor the lower power crosslink comms, and with a little bit of technical tweaking to your ground station (you would need GPS based PPS to measure propagation time, maybe ~$100 invested), you could participate in Space to Earth pseudo-range measurements that would contribute to a secondary orbit determination goal. To be clear, the up and down linking for the satellite DX attempts would be standard FSK9600, AX.25, so as long as your station can do that, you can use the crosslink path for multi-hop comms. Its only the S-to-E pseudo range measurement that would require a bit of additional HW. Does this sound interesting? Would you as an operator be interested in multi-hop satellite packet comms? Do you think this type of operating schedule is acceptable (weekends) to justify Amateur Radio licensing instead of Experimental? Would you be interested in contributing to the science mission (S-to-E pseudo-range measurement)? Would you track the telemetry downlinks and forward that data on to the mission data warehouse? Any and all opinions, good or bad, are welcome. Again, on or off list as you see appropriate is fine with me. My goal with this is to get a sense of what the community's opinion on this topic is and if the constellation were available for use, how much interest there would be in this type of operation. Thanks in Advance! Sincerely, Zach, KJ4QLP -- Research Associate Aerospace Systems Lab Ted & Karyn Hume Center for National Security & Technology Virginia Polytechnic Institute & State University Work Phone: 540-231-4174 Cell Phone: 540-808-6305

5 11

amsat.org.ar online again
by Pedro Converso 02 Apr '17

02 Apr '17

Site amsat.org.ar had been recovered and is online again. Web available at http://amsat.org.ar Satellite Passes at http://amsat.org.ar/pass SAm Satellite logs http://lu7aa.org.ar/log.html Lusex Logs at http://lusex.org.ar Latest Keplerians http://lu7aa.org.ar/text/keps.txt WSPR PicoBalloon http://lu7aa.org.ar/wspr.asp Calculations at http://amsat.org.ar/calcule.html QSL Factory at http://lu7aa.org.ar/qsl.asp In Spanish: ENACOM Ham exams http://amsat.org.ar/examen/examen?p=n Amsat-LU Balloons http://amsat.org.ar/globo12.htm Balloon tracking http://lu7aa.org.ar/vor.asp LUSAT web site http://lusat.org.ar Local Weather Sats http://amsat.org.ar/wx South Am. Sat Award http://amsat.org.ar/certsat.html Users upload area http://amsat.org.ar/index.php 73, LU7AA, Amsat Argentina http://amsat.org.ar info at amsat.org.ar https://facebook.com/Amsat.LU

1 0

Working from EK28.
by David Maciel (XE3DX) 02 Apr '17

02 Apr '17

Hi guys, I am now in EK28, Coatzacoalcos, Veracruz. I'm going to work on FM and SSB satellites in my free time, I think they're going to be few passes, the office work to occupy all day, maybe be here Monday and Tuesday only. I will be in touch via twitter @ xe3dx, contacts are confirmed via direct or LoTW preference. I hope to listen to them in the birds and to be able to give this rare grid on the Gulf of Mexico. PS.- Please be very patient on the FM satellites, I am getting very noisy on my Arrow antenna, sometimes I do not hear everyone's calls. You can help a good QSO by using the "International Phonetic Code". David Maciel XE3DX *http://www.qsl.net/xe3dx/ <http://www.qsl.net/xe3dx/>* *david.xe3dx(a)gmail.com <david.xe3dx(a)gmail.com>*

1 0

Amsat live Oscar satellite status page
by jeffory broughton 02 Apr '17

02 Apr '17

Is it not working today ? I can't enter anything.thanks. jeff broughton

4 3

VUCC Awards/Endorsements for March 2017
by John Papay 02 Apr '17

02 Apr '17

Here are the endorsements and new VUCC Satellite Awards issued by the ARRL for the period March 1, 2017 through March 30, 2017. There was no update on March 31st. Congratulations to all those who made the list this month! CALL GRIDS KO4MA 1510 W5PFG 990 N8HM 862 NP4JV 552 N6UK 372 KK4FEM 327 K5ND 225 AI6GS 175 NS3L 175 NJ7H 125 VE7CEW 103 (New VUCC) This list was developed by comparing the ARRL .pdf listings for March 1st and March 30th. It's a visual comparison so omissions are possible. Apologies if your call was not mentioned. Thanks to all those who are roving to grids that are rarely on the birds. They are doing most of the work! 73, John K8YSE --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

1 0

satpc error
by Bob- W7LRD 02 Apr '17

02 Apr '17

should have added win 10 computer On startup I get OLE-fehler 8004503A class ID: A55849567-FF07-419C-BACD-9931 F1256D92 What do I have going on?? program does not connect to radio, turns antennas, not reading doppler sqf files from the digitally challenged 73 Bob W7LRD

1 1

EO73 Mode change
by Graham Shirville 02 Apr '17

02 Apr '17

Hi folks, FUNcube/AO73 is now in full time amateur mode with the transponder ON. The plan is for it to switch back to auto mode on Sunday pm UTC as usual but, for operational reasons, this may be delayed until Monday pm UTC. Please see below for other FUNcube transponder info Have FUN with the transponder. 73s Graham G3VZV and the FUNcube team. ++++++++++++++++++++++++++++++++++ FUNcube frequencies and other details ++++++++++++++++++++++++++++++++++ AO-73 FUNcube-1 The transponder is normally operational only when the satellite is in eclipse, ie the solar panels are NOT being illuminated. During weekends (from pm Fridays UTC to PM Sundays UTC) the transponder is operational 24/7. When the transponder is switched off, the telemetry beacon is on full power, when the transponder is on the beacon it is on low power. During holidays, eg Christmas, New Year, Easter, etc, the transponder maybe activated for extended periods. Watch AMSAT-BB for announcements which are usually made on Friday evenings (UTC) The nominal transponder frequencies are: Uplink: 435.150 - 435.130 MHz LSB (Inverting) Downlink: 145.950 - 145.970 MHz USB Telemetry Tx: 145.935 MHz BPSK (The passband may be up to 15kHz higher depending on on-board temps. Lower temperatures give higher freqs!) FUNcube-2 (aka FUNcube on UKube) The FUNcube-2 sub-system continues to operate autonomously and, almost continuously, in amateur mode. The transponder is operational and the telemetry downlink is functioning with about 70mW output. The FUNcube-1 Dashboard does not correctly display the telemetry but it does correctly decode the data and uploads it to the FUNcube Data Warehouse from where it can be examined. Most of the real time data channels are operational and these include battery voltages, temperatures and ADCS data coming via the main On Board Computer (OBC). The transponder is interrupted for a few seconds every 2 minutes when the other transmitter sends its CW beacon and, occasionally, for a few seconds when the main OBC reboots (approx seven times each orbit). The nominal transponder frequencies are: Uplink: 435.080 - 435.060 MHz LSB (Inverting) Downlink: 145.930 - 145.950 MHz USB Telemetry Tx: 145.915 MHz BPSK (The passband may be up to 10kHz higher depending on on-board temps. Low temperatures give higher freqs!) EO79 FUNcube-3 Due to power budget constraints the transponder cannot be operational 24/7 and an orbit specific schedule has been developed. The transponder will commence operation 27 minutes after the spacecraft enters sunlight and will stay on for a period of 25 minutes. This schedule may be modified in future months as a result of experience. The nominal transponder frequencies are: Uplink: 435.0723-435.0473 MHz LSB (Inverting) Downlink: 145.946-145.971 MHz USB Further detailed info on EO79 transponder frequencies is at: https://amsat-uk.org/2016/11/10/eo79-funcube-3-transponder-commences-regula… EO88/Nayif-1/FUNcube-5 EO88 is presently operating in autonomous mode. The transponder is operational when the satellite is in eclipse, ie the solar panels are NOT being illuminated. When the transponder is switched off, the telemetry beacon is on full power, when the transponder is on the beacon it is on low power. The transponder frequencies are: Uplink: 435.045 – 435.015 MHz LSB (inverting) Downlink: 145.960-145.990 MHz USB Telemetry Tx: 145.940MHz All FUNcube transponders are sponsored by AMSAT-UK and AMSAT-NL. We are very grateful for the assistance given by Innovative Solution In Space Bv, The Netherlands.

2 2

OLE-fehler ?
by Bob- W7LRD 02 Apr '17

02 Apr '17

What does this mean? Constant on my SATpc-32 73 Bob W7LRD

7 7

satpc-32 error
by Bob- W7LRD 02 Apr '17

02 Apr '17

On startup I get OLE-fehler 8004503A class ID: A55849567-FF07-419C-BACD-9931 F1256D92 What do I have going on?? program does not connect to radio, turns antennas, not reading doppler sqf files from the digitally challenged 73 Bob W7LRD

1 0