Categories
Telemetry

AO-27 2022-06-15

Nothing heard from AO-27 2022-06-15 08:45 UTC north pass

Categories
Ham Satellite news

FUNcube-1 / AO73 Update

AO-73. Photo by Wouter Weggelaar PA3WEG
AO-73. Photo by Wouter Weggelaar PA3WEG

From the Funcube web:

Many will be aware that FUNcube-1 has been transmitting a special Fitter message to commemorate her Majesty the Queen’s Platinum Jubilee earlier this month. Everyone who receives this message and uploads it to the Data Warehouse using the Dashboard can generate a certificate to remember this historic event. The special message includes a link to a website that has the full instructions. It is intended to keep this message active until the end of June.

The spacecraft’s orbit continues to run near the sun’s terminator and this is resulting in less than optimal solar power generation. The battery bus voltage is now centering around 7.45 volts rather than the 8+ volts that we have seen for many years. We believe that this reduced voltage level may be due to a combination of factors, illumination levels, battery and/or solar panel degradation or, possibly, gradual changes in some component values within the EPS. It is also possible that the high spin/tumble rates that we experienced over the recent months may be involved. Our thanks to to Colin VK5HI and his team for continuing to keep track of this issue for us.

Operators may have noticed that the spacecraft is now in high power telemetry mode when in sunlight and in receive only mode during eclipse. Although the transponder is not currently active, with the rapid fading presently being experienced on the downlink, the high power telemetry setting will assist listeners to decode the data more easily.

We continue to be extremely grateful to all those stations who continue to contribute their data to the FUNcube data warehouse. The information you are providing is invaluable to the FUNcube to team and will greatly assist us in managing the spacecraft through its “middle age” after more than eight years in space!

Categories
Ham Satellite news

AO-27 Telemetry and Reception Reports Requested

From ANS-163:
Stephan Greene, KS1G reports, “AO-27’s on/off times run open-loop and have drifted a bit so that the information on ao27.net is out of date. We’re trying to collect current telemetry before attempting to upload new settings.

“AO-27 sends 20 seconds of AFSK telemetry followed by 240 seconds of FM repeater operation during descending nodes (North to South passes). As best we can determine from Satnogs observations, the satellite currently turns on when near the equator and shuts off at about 12-14 deg South latitude. Stations with UHF receive capability should be able to receive the telemetry and detect/use the FM repeater operation.

“We think the ascending node on time begins when AO-27 is at about 75 deg N latitude and ends around 85 deg N as the satellite begins the descending part of the orbit. Stations probably have to be fairly far north with good northern horizons to hear anything. No telemetry is sent on ascending node passes.

“The AO-27 command team would greatly appreciate reception reports, especially with the time(s) telemetry or repeater operation started/ended. Please provide station location, 6 character grid square is sufficient. If you have AFSK reception/decode capability, any telemetry successfully decoded. Reports from northern stations able to copy the start or end of the ascending node on time are also sought.

“Please send reports to ks1g at amsat dot org.”

[ANS thanks Stephan Greene, KS1G for the above information.]

Categories
Ham Satellite news

AO-73 Fitter Message for The Queen’s 70th Jubilee Celebration

From AMSAT-UK:

In June 2022, Her Majesty The Queen becomes the first British Monarch to celebrate a Platinum Jubilee after 70 years of service.

AMSAT-UK has decided to send a special Platinum Jubilee greetings message via FUNcube-1 (AO-73). Anyone who receives this message and uploads it to the Data Warehouse using the Dashboard can generate a certificate to remember this historic event.

AO-73/FUNcube-1 is transmitting the Jubilee Fitter message on the BPSK Telemetry beacon which has a nominal frequency of 145.935 MHz +/ Doppler.

Note!
The link to the certificate web site can be seen in the fitter message.

Categories
Ham Satellite news Members news

Vinnare i AMSAT-SM 40-årstävling

Nu är äntligen vinnarna i AMSAT-SM 40-årstävling lottade! Det var 33 st som skickade in svar, väldigt många hade alla rätt så det fick bli lottning av de tre priserna. Mera fakta om varje fråga finns att läsa längre ner.

Vinnarna – stort grattis!

Carl-Axel Lindberg SM6NZV
En 2.4 GHz Upconverter MK4 från DX-Patrol värde ca 1500 kr

Christer Renström SM2UJW
Portabel Yagi-antenn – den populära Arrow värde ca 1200 kr

Micke Larsson SM2IAR
Ett presentkort från Limmared Radio & Data AB1000 kr

Frågorna med svar

Vad heter den satellit som mirakulöst började fungera igen efter att ha varit tyst i många år och idag fortfarande går att använda?

Ja visst var det Oscar-7 som helt plötsligt började fungera igen. Teorin är att med åren så har kopplingen mot de trasiga batterierna släppt så att strömmen från solpanelerna nu når elektroniken, så fort solen lyser på satelliten.

Vad kallas den typ av datamodulation som Funcube-1 (AO-73) använder för telemetri?

Den kallas BPSK och är mycket effektiv. 30 milliwatt ut från satelliten räcker för att ta emot den på 145 MHz med inte allt för stora antenner. Med 300 mW går den att ta emot med mycket enkla anetnner.

Vem var AMSAT-SMs första ordförande?

Det var SM5IXE Thomas vilket man kan läsa på det allra första numret av AMSAT-SM Journal.

En känd svensk rymdprofil har varit ordförande i AMSAT-SM. Men vem?

Sven Grahn var under en period ordförande. Sven syns ofta i TV och andra medier och är nu projektledare för KTHs MIST-projekt.

Den populära satelliten RS-44 sitter faktiskt fast på något annat. Men vad?

Rykterna säger att den sitter fast på ett gammalt raketsteg vilket nästan alla hade rätt på. Ibland hör man att signalen försvinner från satelliten och min egna teori är att det är någon del på raketsteget som skymmer antennerna mot jorden just då.

GOLF heter ett nytt projekt från AMSAT-NA. Vad står det för?

Greater Orbit, Larger Footprint Finns att läsa om på AMSAT-NAs hemsida. Man vill helt enkelt komma upp med satelliter på högre bana än LEO, för att få bättre DX-möjligheter.

Utslagsfråga: Hur mycket väger satelliten Oscar-40 (som inte fungerar längre)?

Googlar man så man ofta upp vikterna 397 kg eller 400 kg. Men det finns ännu mer data och fakta än så, en del har gjort ett bra jobb och skrivit en lång förklaring. Jättekul att ni har tagit er tid att leta fakta!

Categories
Ham Satellite news

New Chinese Space Station will get ham radio

Info from ANS-128:

The CSSARC is the Amateur Radio payload for Chinese Space Station, proposed by Chinese Radio Amateurs Club (CRAC), Aerospace System Engineering Research Institute of Shanghai (ASES) and Harbin Institute of Technology (HIT). The payload will provide resources for radio amateurs worldwide to make contacts with onboard astronauts or to communicate with each other.

The first phase of the payload is capable of providing the following functions utilizing the VHF/UHF amateur radio band:

  1. V/V or U/U crew voice;
  2. V/U or U/V FM repeater;
  3. V/V or U/U 1k2 AFSK digipeater;
  4. V/V or U/U SSTV or digital image.

The following frequencies have been coordinated:

  • V/V crew voice NFM 145.850, 145.985
  • U/U crew voice NFM 435.050, 436.510
  • V/U FM repeater NFM 145.875, 436.510
  • U/V FM repeater NFM 435.075, 145.985
  • V/V digipeater AFSK-FM 1200 145.825, 145.825
  • U/U digipeater AFSK-FM 1200 437.550, 437.550
  • V/V imaging SSTV-FM 145.850, 145.985
  • U/U imaging SSTV-FM 435.050, 436.510

A launch to the Chinese Space Station is planned for the third quarter of 2022 from Wenchang.