Category: Ham Satellite news

Nu är AO-92 öppen för amatörradiobruk, eller som det kallas på satellitspråk “Commissioned”. Nedan kan du läsa det officiella meddelandet inkl. en bra frekvensguide:

On the 03:25 UTC pass on January 26, 2018, AMSAT Vice President –
Engineering Jerry Buxton, N0JY, announced that AO-92 had been
commissioned and formally turned the satellite over to AMSAT
Operations. AMSAT Vice President – Operations Drew Glasbrenner, KO4MA,
then declared that AO-92 was now open for amateur use.

Initially, the U/v FM transponder will be open continuously for a
period of one week. After the first week, operations will be scheduled
between the U/v FM transponder, L-Band Downshifter, Virginia Tech
Camera, and the University of Iowa’s High Energy Radiation CubeSat
Instrument (HERCI).

Schedule updates will appear in the AMSAT News Service Weekly
Bulletins and will also be posted to the AMSAT-BB, AMSAT’s Twitter
account (@AMSAT), the AMSAT North America Facebook group, and the
AMSAT website at https://www.amsat.org/satellite-schedules/

AO-92 was launched on the PSLV-C40 mission from Satish Dhawan Space
Centre in Sriharikota, India on January 12, 2018. For the past two
weeks, the AMSAT Engineering and Operations teams have been testing
the various modes and experiments on board. Testing has shown that
both the U/v FM transponder and L-Band Downshifter work very well. The
Virginia Tech camera has returned stunning photos and data from HERCI
has been successfully downlinked.

AMSAT thanks the 178 stations worldwide that have used FoxTelem to
collect telemetry and experiment data from AO-92 during the
commissioning process. The collection of this data is crucial to the
missions of AMSAT’s Fox-1 satellites. Please continue to collect data
from AO-85, AO-91, and AO-92.

RADIO PROGRAMMING CHART
Fox-1D Doppler Shift Correction

Memory 1 (AOS) – TX 435.340 MHz (67.0 Hz Tone), RX 145.880 MHz
Memory 2 (Rise) – TX 435.345 MHz (67.0 Hz Tone), RX 145.880 MHz
Memory 3 (TCA) – TX 435.350 MHz (67.0 Hz Tone), RX 145.880 MHz
Memory 4 (Descend) – TX 435.355 MHz (67.0 Hz Tone), RX 145.880 MHz
Memory 5 (LOS) – TX 435.360 MHz (67.0 Hz Tone), RX 145.880 MHz

The L-band experiment will use 1267.350 MHz uplink with 145.880 MHz
downlink. UHF and L-band uplink operation are set by the command
stations; the operating schedule will be posted.

[ANS thanks AMSAT Vice-President Engineering, Jerry Buxton, NØJY,
AMSAT Vice President Operatings Drew Glasbrenner, KO4MA, and AMSAT
Executive Vice President Paul Stoetzer, N8HM for the above information]

Det finns en del ny information om arbetet med AO-92 och L-bandstesterna (se även videon nedan).

“The AMSAT Engineering and Operations teams have been hard at work testing the various modes and experiments aboard AO-92 since its launch on January 12th. Since the last update, testing has concentrated on the University of Iowa’s High Energy CubeSat Radiation Instrument (HERCI) experiment and the AMSAT L-Band Downshifter.”

Läs mer på:

AO-92 Commissioning Update: HERCI Experiment and L-Band Downshifter Tested

AO-73 går nu in i kontinuerligt läge där solen lyser på satelliten och därför ändras schemat på AO-73 enligt nedanstående (info från G3VZV AO-73 hemsida):

The time when AO73 enters continuous sunlight, for the first time, is fast approaching. Current estimates show that this will commence on February 6th and last through until March 13th.

Obviously, the autonomous switching system that the spacecraft has been using to switch between amateur mode, with the transponder on in eclipse and educational mode with high power telemetry only in sunlight, will no longer work.

Already the periods of eclipse are reducing quite rapidly and we are therefore planning for manual mode switching to take be undertaken. This will start from the week beginning Jan 21st and will follow this initial plan.

Wednesday evening (UTC) or Thursday morning – switch to full time amateur mode – ie transponder on with low power telemetry.

Sunday evening (UTC) or Monday morning – switch to full time educational mode with high power telemetry only.

So if you are planning school demonstrations or particular  DXpeditions please take this new schedule into account.

The team may have to flex this plan with experience as this situation was not allowed for in the original mission plan!

Lyckad uppskjutning av Fox-1D AO-92 skedde kl 03:59UTC den 12 januari (2018). Telemetri togs emot drygt en timme efteråt. Det finns många källor på internet runt AO-92 och jag hänvisar här till några:

• AMSAT-NA officiell info.
• “Start-guide” som PDF
• Telemetri-board