March 2021 - AMSAT-BB - mailman.amsat.org

3cm moon bounce
by Jean Marc Momple 19 Mar '21

19 Mar '21

Good Evening, This query is somehow not really satellite related but my question is very linked to perform tests on my new dish for eventual microwave satellite transmissions in microwave bands and DSN. Is anyone aware of any 3cm beacons frequency list for EME and their schedule of Tx? Thanks for any info. Jean Marc (3B8DU)

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EM50/51 Today
by Bob Liddy (K8BL) 19 Mar '21

19 Mar '21

Gridders, Gonna try for EM50/51 today.CAS-4A 1723Z jumping to CAS-4B before LOS. If not there in time,I'll go for CAS-4A 1903Z jumping to 4B. Downlink well below center. 73, Bob K8BL

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SatPC32 error "Zugriffsveletzug"("access violation")
by Erich Eichmann 19 Mar '21

19 Mar '21

Hi, During the last days some users reported that SatPC32 caused the error message "Zugriffsverletztung bei Adresse..." or "access violation at address...". after they updated their Keps file. The program could no longer be closed normally but only using the Windows Task Manager. Yersteday John, AA2HJ, reported that he also got the error. He had completlely filled his "Selected" lsit with the possible number of satellites (24). The error occured when he tried to update nasabare.txt via the "Download Keps" function. He then found out that nasabare.txt contained the NO-84 data set twice. Also, the file had had not been updated for 6 days. As I have seen in the meantime, the same applies to nasa.all. I then did the same for myself and actually received the error message "access violation". I had to close the program with the Task Manager. After a few restarts, the program did no longer start and the error message appeared "Error while loading Standard.SAT " I was able to fix the error by replacing the file "Standard.SAT" in the main data folder by the file Standard.SAT from the sub folder CfgII, which only contained approx. 12 satellites like upon installation. The error seems to be due to the faulty file nasabare.txt, when the "Selected" list is full and contains the satellite NO-84. Without this satellite, the error did not occur for me, even if the list was full. Unfortunately, I was only able earlicer yesterday to to recommend to re-install the program to a user who had not backed up his settings with DataBackup I hope AMSAT will soon fix the Kepsfiles. Until then one should not add NO-84 to the selected list. To replace the file Standard.SAT in the main folder by the same file from sub folders CfgII, CfgIII or CfgIV you have to make hidden files and folders visible (under Windows 10 start the File Manager, then: View > Options > Folder Options > View). The path to the data folder will be: C:\User\Username\AppData\Roaming\SatPC32. If you have a flawlessly working configuration you should save it with DataBackup (SatPC32 menu "Programs"). Then you can easily restore it if errors occure later. 73s, Erich, DK1TB

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Re: BCCSAT-1 launched into space
by Mark Jessop 19 Mar '21

19 Mar '21

Hmm that does look similar doesn't it... (The block diagram for KnackSat is here: https://drive.google.com/file/d/0B4dwLLK3X59yekd6ekc5a284TEE/view ) Hopefully the BCCSAT team will release information on their downlink telemetry before the launch. As per the IARU satellite coordination documentation: "With the exception of control signals exchanged between earth command stations and space stations in the amateur-satellite service all amateur signals shall not be encoded for the purpose of obscuring their meaning. To meet this requirement, operators of satellites in the amateur-satellite service must publish full details of their modulation, encoding and telemetry formats and equations before launch." It's quite sad how many satellites are being launched taking advantage of the amateur radio satellite spectrum without giving anything back to the amateur radio community. I realise developing a cubesat is a challenge (I'm working on one myself... though not using the amateur bands), and that time may be short - but cubesat teams should remember that their 'free' access to amateur radio spectrum comes at the price of openness and transparency with respect to your satellites transmissions. There's heaps of amateur radio operators out there that would love to help receive telemetry from your satellites... but if you don't release any information then we can't help you. 73 Mark VK5QI On Fri, Mar 19, 2021 at 7:43 AM KI7UNJ Tucker <ki7unj(a)gmail.com> wrote: > Mark, > > What it looks like to me they are using the same freq as Knacksat... heck > seems like almost the same technology on board as Knacksat. > > http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=520 > > > > On Thu, Mar 18, 2021 at 1:42 PM Mark Jessop <vk5qi(a)rfhead.net> wrote: > >> Hi Tanan, >> >> Can you please point us to the specifications for your 9k6 and 1k2 >> telemetry downlinks? Usage of the amateur radio band requires that >> satellite operators release all their telemetry formats. This allows >> interested amateurs to be able to have a go at decoding telemetry, and >> allows projects like SatNOGS to help collect telemetry using the huge >> networks of volunteer ground-stations. >> >> In particular I would be very interested to decode the SSDV data. >> >> Also, it looks like this frequency was not coordinated with the IARU - or >> at least it's not showing up on the IARU coordination list ( >> http://www.amsatuk.me.uk/iaru/finished.php ). >> >> 73 >> Mark VK5QI >> >> On Fri, Mar 19, 2021 at 5:12 AM Tanan Rangseeprom <nanrspm(a)gmail.com> >> wrote: >> >>> BCCSAT-1 is an educational multi-spectral Cubesat 1U developed by the >>> cooperation between Bangkok Christian College and the King’s Mongkut >>> university of technology north Bangkok. http://bccsat.bcc.ac.th/ >>> >>> Schedule When our cubesat is completely finished it will be launched >>> into space in March 20,2021 06.07 AM UTC at Russia with the Soyuz-2.1 >>> rocket by UNISAT-7 GAUSS SRL to the low earth orbit at 575 km. >>> http://en.roscosmos.ru/21973/ and https://www.roscosmos.ru/30285/ >>> >>> BCCSAT-1 >>> 1 99999U 21999A 21079.53571058 -.00000058 00000-0 00000+0 0 06 >>> 2 99999 098.4012 345.1641 0004344 283.2593 155.6823 14.80364805 03 >>> >>> Downlink Frequency >>> Beacon 435.635 MHz CW https://www.youtube.com/watch?v=hPpSTEf3PUI >>> Slow Scan Digital Video SSDV Data 435.635 MHz AFSK 1.2 kbps >>> Telemetry Data 435.635 MHz GMSK 9.6 kbps >>> >>> After launch into space if AMSAT member receives the CW signal of >>> BCCSAT-1 satellite. please send information to our team directly an email >>> to: bccsat1(a)gmail.com >>> >>> BCCSAT-1 is a technology demonstration satellite in Thailand. High >>> school students in Bangkok Cristian College in collaboration with King >>> Mongkut’s University of Technology (KMUTNB) and the Radio Amateur Society >>> of Thailand (RAST) https://www.youtube.com/watch?v=zEcg5q7ZBw0 are >>> building the satellite. >>> >>> The project aims to build capacity on systems engineering, space >>> education, and radio communication technology to students. During the >>> project, students will learn about communication technology through amateur >>> radio activities. It also encourages other interested people to receive the >>> satellite signal. >>> >>> The main missions of BCCSAT-1 include: (1) testing in-house developed >>> satellite transceiver and antenna in orbit (2) experiment of Slow-Scan >>> Digital Video (SSDV) transmission from the satellite (3) take pictures of >>> Earth by cameras onboard satellite >>> >>> BCCSAT-1 communication subsystem is an in-house developed transceiver >>> and antennas. It has the capability to transmit GMSK modulation signal at >>> 9.6 kbps, FSK for SSDV at 1.2 kbps and receive AFSK signal at 1.2 kbps. The >>> transceiver will send its parameter such as RSSI and temperature to the >>> ground station. >>> >>> BCCSAT-1 will carry four cameras onboard the satellite and aim to >>> capture images of the Earth in different wavelengths: red, green, blue, >>> NIR, and Red Edge band. >>> >>> We hope to process the images acquired for the Normalized Difference >>> Vegetation Index (NDVI) and widely used in Science education. The images >>> will be widely distributed among amateur radio community via the experiment >>> of SSDV transmission system and GMSK packets downlink. Moreover, BCCSAT-1 >>> will be able to transmit pre-stored images chosen by high school students. >>> >>> BCCSAT-1 will provide the multi spectral images by having the total of 5 >>> cameras on board; Red, Green, Blue, NIR, and Red Edge bands. The images we >>> get from these cameras will be used to process for the Normalized >>> difference vegetation index (NDVI), that will significantly provides huge >>> advantage on analyzing the terrain of the country. >>> >>> 73 >>> Tanan Rangseeprom , HS1JAN >>> >>> ----------------------------------------------------------- >>> >>> 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! >>> >>> View archives of this mailing list at >>> https://mailman.amsat.org/hyperkitty/list/[email protected] >>> To unsubscribe send an email to amsat-bb-leave(a)amsat.org >>> Manage all of your AMSAT-NA mailing list preferences at >>> https://mailman.amsat.org >> >> >> ----------------------------------------------------------- >> >> 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! >> >> View archives of this mailing list at >> https://mailman.amsat.org/hyperkitty/list/[email protected] >> To unsubscribe send an email to amsat-bb-leave(a)amsat.org >> Manage all of your AMSAT-NA mailing list preferences at >> https://mailman.amsat.org > > > > -- > *Casey Tucker KI7UNJ* > https://twitter.com/KI7UNJ > >

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Apologies for the SO-50 pass this afternoon
by hamdan＠ix.netcom.com 19 Mar '21

19 Mar '21

Dear Folks: I tried to work the SO-50 pass today, and indeed, I could hear myself on the downlink for quite a while, but couldn't hear anything else. I have already received 3 emails from different people who said I was heard by them and many people were calling me without getting a response. I apologize since I'll bet I screwed up that pass for a bunch of people. I'm not sure what happened. I am using a new IC 9700 (after 27 years with an FT-736R) and there certainly is a learning curve on the 9700). However, I've already worked people on SO-50 with the new rig so I'm not sure what happened on that pass, especially since I could hear myself. Again, my apologies. 73 de Bernie, KF0QS

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Houston AMSAT Net #1400 and 28 years
by Bruce 19 Mar '21

19 Mar '21

It has been some 28 years since I first became involved with the Houston AMSAT Net. Andy, W5ACM, (then WA5ZIB), Marty, WV5Y, (then WD5DZC) and I were staples on the net. Ed, N5EM, was the host back then. Ed backed off and Andy took over. Andy and Marty were doing the net many years prior to my joining. I started numbering the nets in 1993. If you missed this special net, you can stream it from my website http://www.amsatnet.com click on Our Audio and select Net #1400. You can also listen as a podcast at the iTunes store by searching for KK5DO or AMSAT. Andy has been under the weather and not able to join us for this net. We have had fun over the years and we have done many different things. I did a little history from the beginning until today. If you have a chance take a listen. 73...bruce -- Bruce Paige, KK5DO AMSAT Director Contests and Awards AMSAT Board Member 2016-2022 ARRL Awards Field Checker (WAS, 5BWAS, VUCC), VE Houston AMSAT Net - Wed 0100z on Echolink - Conference *AMSAT* Also live streaming MP3 at http://www.amsatnet.com Podcast at http://www.amsatnet.com/podcast.xml or iTunes Latest satellite news on the ARRL Audio News http://www.arrl.org AMSAT on Twitter http://www.twitter.com/amsat

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EM03 log
by John Geiger 18 Mar '21

18 Mar '21

Logged the following stations from EM03 today: N7ZO W4BCX K4RGK KJ4EU WE4B W4AQT K4UPI KS1G AK7DD AC9DX AA9JS Let me know if any corrections are needed. WIll be uploading QSOs into LOTW later today. Thanks for all of the calls and QSOs, been a fun 3 days of gridexpeditions to help celebrate spring break! 73 John AF5CC

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EM03 CAS4A/CAS4B 2050utc
by John Geiger 18 Mar '21

18 Mar '21

I am staying in EM03 for the afternoon so will be on the CAS-4A and CAS-4B passes around 2050UTC this afternoon for anyone needing that grid. Not real high elevation passes here but will give it a try. 73 John AF5CC

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Alternative keps data
by Pedro Converso 18 Mar '21

18 Mar '21

As an alternative Keps data updated every 6 hours at: http://amsat.org.ar/keps.txt 73, lu7abf, Pedro

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Re: amsat-bb web access ?
by Amsat Argentina 18 Mar '21

18 Mar '21

Enviado desde Correo para Windows 10 THANKS !! -- Este correo electrónico ha sido comprobado en busca de virus por AVG. http://www.avg.com

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