Video – ARISSat-1 Operational Survey Results



This video from the ARRL/TAPR DCC in Atlanta produced by Gary Pearce KN4AQ of HamRadioNow shows the presentation given by Steve Bible N7HPR in which he reviews a survey showing just how hams and non-hams (primarily teachers) participated in the ARISSat / KEDR project (the follow-up to SuitSat, without the suit).

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Radio Hams send photo via satellite

ARISSat-1 Deployment

ARISSat-1 Deployment

The Cincinnati press reports that two Anderson Township amateur radio operators recently sent and received a photo from a satellite that was manually deployed from the International Space Station (ISS).

Farrell Winder W8ZCF and his son Jeff Winder KB8VCO achieved this despite the fact that an antenna on the satellite had snapped off prior to launch.

Read the Cincinnati press article at

HamRadioNow – AMSAT Edition

In this HamRadioNow video Lou McFadin W5DID describes the ARISSat-1 satellite, using the operational model at the AMSAT booth at the Orlando HamCation. HamRadioNow says Gary KN4AQ feels inadequate in the presence of such accomplished hams, and he insults the astronauts. That makes Lou uncomfortable, so he goes on to talk about the future of AMSAT and ARISSat.

Lou says that the reason for the ARISSat-1 435 MHz antenna snapping off was due to damage in transit up to the Internatonal Space Station (ISS). He mentions that he hopes NASA can be persuaded to take ARISSat-2 to the ISS. Lou also describes the problems caused by the US Federal Government ITAR restrictions.

Watch HamRadioNow Episode 2, Part 2 – AMSAT

The grab handles shown on ARISSat were supplied by a member of AMSAT-UK.

HamRadioNow http://HamRadioNow.TV/

YouTube Channel

Winners in the ARISSat-1/KEDR Chicken Little Contest

The Chicken Little Contest received 77 entries from 17 different countries, and all continents except Antarctica.

Based on comments sent along with the submissions, a wide variety of techniques were used. These ranged from detailed calculations, to comparisons with past satellites, to guesses based on birthdays.

The winners in each category are:

+ Kindergarten through grade 8:
Cora Haefner, KK4ECV, Fort A.P. Hill, VA, USA

+ High School, grades 9 through 12:
Cameron, Lancashire, UK

+ Adult:
Thomas Frey, HB9SKA, Birr, Switzerland

Cora, KK4ECV and Thomas, HB9SKA were both within 15 hours of the
best data we have from Space Track: approximately 0700 on 4 January 2012, in the South Atlantic.

All three winners have received an appropriate Chicken Little Certificate, and the congratulations of the ARISSat-1/KEDR Team. Thanks go to all those who entered, and especially educators who worked with students.

Winners of the ARISSat-1/KEDR Grab the Last Telemetry Contest.

Thanks to the dedication of stations around the world, a nearly steady stream of digital telemetry reports were received in the final days from ARISSat-1/KEDR:

31 Dec — 1125
01 Jan — 1537
02 Jan — 1541
03 Jan — 1048
04 Jan — 107

Many other reports were received from stations copying the voice, SSTV, and telemetry transmissions, as well as some contacts through the transponder.

The final digital data received was copied by both JA8TCH, Mori Seiji, Sapporo City, Japan, and JA0CAW, Tetsurou Satou, Niigata City, Japan.
It was received at 06:02:14, 4 January, 2012, less than an hour before the estimated point of loss in the South Atlantic.
Their data, combined with the submissions of many others, constitutes the most comprehensive coverage of the reentry of any amateur satellite.

JA8TCH and JA0CAW will receive a certificate for their achievement. They and all who submitted telemetry throughout the ARISSat-1/KEDR mission have the thanks of the entire team.

Alan Biddle, WA4SCA and the ARISSat-1/KEDR Team



ARISSat-1 Logo

The amateur radio satellite ARISSat-1, deployed from the ISS on August 3, fell silent on Wednesday, January 4, as it re-entered the Earth’s atmosphere.

The ARISSat website shows the last telemetry was captured at 06:02:14 UTC on Jan. 4  with these temperatures:

IHU PCB    75°C
PSU     76°C
RF     88°C
Batt     55°C
RF Enc 67°C

The full telemetry data can be seen at

Mike Repprecht DK3WN reports that Tetsurou Satou JA0CAW captured telemetry at 05:59 UTC. Mike says it’s remarkable that the last voice message heard was from Yuri Gagarin. See the last data on Mike’s SatBlog The JA0CAW Blog in Google English is at

Konstantin Vladimirovich RN3ZF listened for the satellite at 08:42 UTC using an AMSAT-UK FUNcube Dongle with WRplus. On the FUNcube Yahoo Group he says “the telemetry was absent, voice messages were not legible, very silent and interrupted. Most likely, I saw last minutes in the life of the satellite.” He continued monitoring but did not detect any further signals from the satellite. He has made available his final ARISSat-1 recordings in WRPlus format at:
Note the files are large.

Education has been a large part of the ARISSat project and on the FUNcube Yahoo Group Simon Kennedy G0FCU says he was glad he was able to receive good signals and SSTV pictures last week for his daughter to take to school as part of her project on Space.

Listen to a recording by Mineo Wakita JE9PEL made at 01:22-01:27 UTC, Jan 4, 2012, Ele 7 W-WN-N, 145.950MHz FM over Japan when it would have been at an altitude of about 175 km

A graph showing the descent of ARISSat-1 can be seen at 

SSTV pictures taken by ARISSat-1 can be seen at

AMSAT Bulletin Board (AMSAT-BB)

Dec. 30 – ARISSat-1 Getting Hotter:

ARISSat-1 altitude is rapidly decreasing

Sergey Samburov RV3DR with ARISSat-1

Sergey Samburov RV3DR with ARISSat-1

The altitude of the amateur radio satellite ARISSat-1 (145.950 MHz FM) continues to decline rapidly.

On Tuesday, Dec 27, 2011,  ARISSat-1 was losing about 4.1 km (~2.5 miles) a day in altitude, by Friday, Dec 30, 2011 the decay was 5.9 km (3.6 miles) per day. This rate will continue to increase over the next days and ultimately result in the satellite burning up in the atmosphere.

Telemetry reports haven’t shown a large increase in temperatures yet, please collect and report these values during each illumination period. There have been a number of people that continue to update their calculations on when the satellite will re-enter, now expected to be sometime this week.

The fall rate dh/dt is  increasing dramatically. Be sure to do daily updates of the ARISSat-1/RadioSkaf-B Keps from The ARISSat-1 orbit changes daily while the satellite continues to lose altitude.

Roland, PY4ZBZ from Brazil has updated graphs of height and fall rate on his Web site

ARISSat-1 Getting Hotter

AMSAT News Service (ANS)

ARISSat-1 Getting Hotter

Sergey Samburov RV3DR with ARISSat-1

Sergey Samburov RV3DR with ARISSat-1

Ken W7KKE reports that ARISSat-1 is heating up as it starts to enter the Earth’s atmosphere, it can still be heard on 145.950 MHz FM but not for much longer.

On the AMSAT bulletin board he writes:

At 2055Z today [Friday] had a 77 deg pass. Highest temp was the -Z PPT 6 panel temp at 88 C. Yesteday it was temp was 74 C.  RF temp was 57 C which is one degree cooler than observed yesterday.

Keps were only 0.7 days old, but still had to manually chase the signal when it was near predicted TCA.

Ken Eaton GW1FKY posted this report on Friday evening:

Pleased to report lots of activity on the last two passes of ARISSat-1 over here in Europe today  (Friday)

Some calls at 1507 hrs  PD0RKC,  heard you and you were 5 X  8 but dropped to 5 X 5 rather quickly. At 1639 hrs heard ON4GP calling and then in contact with DG1ER, you were  both 5X7 prior to the satellite switching off in eclipse.

Nice to report the activity as we approach the end on the year and an era for ARISSat-1.

You can get orbital predictions times by selecting ARISSat-1 on the online prediction tool at

A graph showing the descent of ARISSat-1 can be seen at

ARISSat-1 . . A Fun HAM Satellite!

AMSAT-UK publishes a colour A4 newsletter, OSCAR News, which is full of Amateur Satellite information.
Free sample issue at Join online at

ARISSat-1 . . A Fun HAM Satellite!


ARISSat-1 . . A Fun HAM Satellite!

David Pruett KF7ETX has released this video of the amateur radio satellite ARISSat-1. There are only a few days left to hear it before it re-enters the Earth’s atmosphere.

The YouTube description reads:

Tune your radios / scanners to 145.950 and listen into the signal from ARISSat-1. ARISSat-1/KEDR Deployed on August 3, 2011 from the International Space Station (ISS). The mission of ARISSat-1/KEDR was specifically designed as an education-based satellite built by amateur radio operators to specifically interest students in scientific and technological careers.

Watch ARISSat-1 . . . A Fun HAM Satellite!


ISS & ARISSat-1 Predictions:

ARISSat Website

You can find the details of the ARISSat-1/KEDR radio frequencies, links to telemetry decoding software and mission details on-line at:

ARISSat-1/KEDR can be accessed on these frequencies:
+ 145.950 MHz FM Downlink
+ 435 MHz – 145 MHz Linear Transponder
+ 145.919 MHz CW Beacon
+ 145.920 MHz SSB BPSK-1000 Telemetry

The latest telemetry can be seen LIVE on your computer or cell phone

David Carr, KD5QGR has added ARISSat-1/KEDR to the list of satellites at the popular “Live OSCAR Satellite Status Page” at: You are invited to submit your reports on this page.

Last chance to hear ARISSat-1

Last chance to hear ARISSat-1

Sergey Samburov RV3DR with ARISSat-1

Sergey Samburov RV3DR with ARISSat-1

The amateur radio satellite ARISSat-1 may have only a few more days to live before it re-enters Earth’s atmosphere. Ken GW1FKY reports it’s putting out a strong signal in the early evening.

On the AMSAT bulletin board Ken writes:

I again monitored and worked into ARISSat-1 during the earlier pass and the final one as it entered eclipse over here in Europe.

The early pass was a low angle from my QTH and screened by buildings so I was not able to access the satellite. However the FM downlink was quite reasonable and I did hear someone active on CW.

The final pass as it moved into eclipse was really remarkable and my downlink and the FM transmissions were booming in . The loudest that I have ever heard from the satellite, in addition I quickly monitored the CW portion and someone was booming in, I could not stay at that end of the band as I was trying to make schedule on SSB. Heard someone calling but not able to confirm whom it was as they were not easy to copy.

Ken was listening in the early evening which seems to be a good time to hear the satellite. The satellite is only operational when its solar panels are illuminated. You can get orbital predictions times by selecting ARISSat-1 on the online prediction tool at

If you hear the satellite on 145.950 MHz FM, you can get a certificate. Depending on what mode you copied, send an e-mail with the information to:

Details at arissat_1_reception_certificates.htm

There is also a CW contest if you send in 5 calls heard on the 145.920 MHz CW transmission of notable AMSAT people of the past & present email them to

ARISSat-1 CW Contest cw-contest/

Catch the Last ARISSat-1 Telemetry

Get your colour ARISSat-1 Frequency Guide


FrequencyCast ARISSat-1 Video

The UK Tech Podcast, FrequencyCast, has released a short video showing reception in Essex of FM voice and an SSTV image from the amateur radio satellite ARISSat-1.

The 145.950 MHz FM signal was recorded at 1055 UT on November 14, 2011 and was uploaded to support the feature at

Watch ARISSat-1 Amateur Radio Satellite Pass 14 Nov 2011

Catch the Last ARISSat-1 Telemetry Competition

ARISSat-1 Re-entry Date January ?

Essex Ham

FrequencyCast – The UK’s TV and Tech Podcast