July 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

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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

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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

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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

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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/ ----

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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

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Antenea Masts
by Paul Overn 03 Aug '18

03 Aug '18

I know this isn't exactly satellite related, but I've asked for help in other places, and the feedback has been sparse. You guys have always been very helpful. I'm looking for a portable antenna mast that I can use between passes while satellite roving. I would like it to be able to go to at least 20', hold a 5 element M2 6 Meter yagi, be able to fit in a small truck and be portable. I have looked at numerous military surplus masts, like at Go-vertical-usa, but they will not return any of my correspondence. I have looked into many "home brew" solutions, but I'm just not that handy. Anyone have any good sites I can go to for something that fits my needs? Thanks in advance for your help! Paul Overn KE0PBR Twitter: @KE0PBR `·.¸¸.·´¯`·.. ><((((º>`·.¸¸.·´¯`·.¸><((((º>`·.¸¸.·´¯`·.. ><((((º>

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Downloading telemetry from CAS-4A and/or B
by Ross Biggar 31 Jul '18

31 Jul '18

Can someone please tell me how to download the telemetry from either of these 2 satellites. I have HS_sound modem installed and AGwe kiss. But are those the correct programs and what settings should I use. They are both on 4k8 GMSK. Thanks Ross ZL1WN

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Re: [amsat-bb] USB driver for Windows 7, 64-bit, for IC-9100
by Erich Eichmann 31 Jul '18

31 Jul '18

Hi Rick, Dave, Alfred, Adrian, Kerry and all others who answered to my inquiry, many thanks to all of you for your quick and helpful answers. I have informed the user. I think he will now be able to install the proper driver correctly. 73s, Erich, DK1TB

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Looking for users of 2M2CP22 & 436CP42 or similar
by EC4TR Luis 31 Jul '18

31 Jul '18

Hi all I just bought these two antennas and I want to use them without the phaser for circular polarization. I want to use a switch for H and V in the mast, the idea is to use it for terrestrial & satellite with vertical rotor. I also wanted to know if routing the two coaxial cables along the boom until the horizontal crossbeam can affect the radiation diagram etc. I have consulted with the guys from M2 and they advise to route the coaxial cables towards the end of the boom and leave them hanging, but that makes the installation very complicated and will cause the boom to go awry. They also tell me about the possibility that VSWR does not match in UHF due to the phasing cables. Have any of you made similar changes with M2 antennas? This is the email exchanged with them Hello Jose, If you route the feedlines down the boom, the gain, pattern and VSWR will be degraded. No metal can run parallel to the elements. We recommend our L-brace kit, http://www.m2inc.com/FGLBKAM so that your coax is not hanging. One L-brace kit is required per antenna. Additionally, if you remove all of the phasing cables, the VSWR may not match the original settings (especially for 70cm). The antenna elements are tuned specifically to counteract any interaction with the phasing cables. You may (or may not) be able to achieve a reasonable match when converted to V/H linear polarity. We have not done any engineering/testing in this configuration. Regards, */Robert Brown, KR7O/* Marketing and Sales 73 Luis EC4TR -- https://www.qrz.com/db/ec4tr https://www.facebook.com/ECfourTR https://twitter.com/EC4TR?lang=es

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