August 2018 - AMSAT-BB - mailman.amsat.org

cube sat model
by Bob- W7LRD 07 May '21

07 May '21

Hi All-Is there a cube sat model, mock up etc, available anywhere 73 Bob W7LRD

8 7

TLEdoctor program to check for preliminary TLE data
by Jarda 06 Aug '19

06 Aug '19

The program can easily detect and fix the TLE preliminary data errors for working in satellite programs after launching the satellite in orbit The original version of the program released before launching Fox-1D works in Windows-7 and higher. Version that works in Windows XP is now added. The program name for Win-XP changes to TLEdoctor. Both programs can be downloaded at http://oscar.ok2gz.eu/fox1d.php 73 Jarda ok2gz --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

2 1

Fw: AO73 Mode change
by Graham Shirville 11 Jun '19

11 Jun '19

Hi folks, AO73/FUNcube is now in amateur mode for the weekend with the transponder on! Please see below for all FUNcube mission info 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. _______________________________________________ Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb

9 17

FUNcube-1/AO73 Operations
by Graham Shirville 15 Mar '19

15 Mar '19

Hi All,Just to confirm that AO73 is now in continuous education mode with the high power telemetry. Amateur mode may be expected to resume on Thursday morning(UTC)73GrahamG3VZV

2 2

EQUiSat Optical Beacon CubeSat
by Trevor . 17 Oct '18

17 Oct '18

Students at the Ivy League Brown University are developing an amateur radio satellite EQUiSat that will carry a Xenon Flash Tube (XFT) subsystem to act as an Optical Beacon that should be visible to the unaided eye of observers on Earth. See http://www.uk.amsat.org/?p=10635 73 Trevor M5AKA AMSAK-UK http://www.amsat-uk.org/ ----

5 5

sat32 and ic7100
by James Brown 21 Sep '18

21 Sep '18

Howdy! I want to connect a Icom 7100 to satpc32. Anyone know the baud and access code for this radio. If I can get this to work I will add my ft 817 as second radio. Thanksjim KI6WJ

3 3

Complete Satellite Antenna System For Sale
by David Swanson 05 Sep '18

05 Sep '18

I've decided to part with my home station and go back to being a fully portable operator for the foreseeable future. So here's what I got: 145mhz Innovantenna 5 Element X-Pol 435mhz Innovantenna 10 Element X-Pol (Factory New, just unboxed, inventoried and repackaged). 2x Innovantenna 2m Balun 2x Innovantenna 70cm Balun 2x Comet 4160N Dupelxers 2x C2G N-Male to N-Male Barrel Connector 2x Tohtsu CX520D Relays, with Dissapation Capacitor Installed. 2x 12 Gauge Wires to Relays with Soldered Ends 4x Andrew CNT-400 Short Jumpers (2' to 4') with Amphenol N-Male Connectors for between Baluns and Relays. 2x DXE Basic Saddle Clamps for Mounting Box 1x DXE Heavy Duty Saddle Clamp for 145mhz X-Pol boom. $550 + Shipping (Guessing it will be about $75 anywhere in the lower 48, will get an exact quote if A few notes - the 145mhz X-Pol was outside for about 10 months at my QTH (Just long enough for me to get my 488 finished) as was an old 435mhz beam, but I damaged part of the 435mhz during disassembly, therefore I ordered replacement 435 metal and it is all factory new never exposed to the weather. All the relays and duplexers were inside weatherproof housings on the Mast and all in good working order. I also drilled holes for a heavy duty DXE saddle clamp on the 2m boom because I had some trouble with the factory saddle clamp slipping on my fiberglass cross beam. There's no slipping now. Here's a picture of everything all spread out on the shop floor: http://druidnetworks.com/xpol.jpg At this time I'm not interested in any trades, and I'm not interested in splitting what I have listed up. Shipping on this is gonna be kinda pricey so if you're anywhere within about 500 miles or so of EM34 I'm willing to meet halfway. Any questions or serious inquiries email me at dave(a)druidnetworks.com. 73! -Dave, KG5CCI

1 1

2018 ARRL/TAPR DCC Call for Technical Papers & Presentations
by Mark Thompson 01 Sep '18

01 Sep '18

2018 ARRL/TAPR DCC (Digital Communications Conference) http://www.tapr.org/dcc September 14-16 Albuquerque, New Mexico Call for Technical Papers & Presentations at DCC The ARRL and TAPR DCC is an international forum for radio amateurs to meet, publish their work, and present new ideas and techniques. Presenters and attendees will have the opportunity to exchange ideas and learn about recent hardware and software advances, theories, experimental results, and practical applications. All digital topics are covered at the DCC including Digital Voice, Data & Video, SDR, DSP, Precise Timing, Spread Spectrum, Networking Tecnologies Mesh Networking. Technical papers are being solicited for presentation at the ARRL and TAPR Digital Communications Conference (DCC) and printed in the annual Conference Proceedings published by the ARRL. Presentation at the conference is not required for publication although authors who attend receive priority for a scheduling a presentation during the technical forums. If you would like to present a technical topic at the DCC and not submit a technical paper email the topic of your presentation to the TAPR Office at: taproffice(a)tapr.org Submission of technical papers for publication should be submitted ASAP to Maty Weinberg, ARRL 225 Main Street Newington, CT 06111 or via the Internet to maty(a)arrl.org More details about technical papers and guidelines for paper submissions are available at: http://www.tapr.org/dcc#dcccallforpapers

4 6

Any BIRDS-2 digipeats or QSOs yet?
by Ryan Noguchi 31 Aug '18

31 Aug '18

Has anyone been successful in digipeating (or making QSOs) on the BIRDS-2 satellites yet? I don't think I've seen any positive reports here on QRZ.com, Twitter, or AMSAT-BB, although the BIRDS-2 team reported the digipeater has been active since 8/23. I'm going to try the 1832Z pass in a couple of hours. Maya-1 should be in digipeating mode per the published Comm plan. Then will be on ISS at 1849Z. 73, Ryan AI6DO

2 2

FUNcube-1/AO73 Operations
by Jim Heck 31 Aug '18

31 Aug '18

Hi All, Just to confirm that AO73 is now in safe mode (low power beacon only, no transponder). We have set this mode as the satellite is about to enter a period of continuous sunlight (for about 9 months). There is more information at https://funcube.org.uk/news/ The plan is to change to education mode (high power beacon) next Friday. 73 Jim G3WGM and the FUNcube team

1 0