Category: Ham Satellite news

DSLWP-A och DSLWP-B är två microsatelliter från Kina som under maj/juni skickats upp i bana runt månen. Det är, vad jag förstår, de första satelliterna med amatörradio ombord som är i bana runt månen! Ett par radioamatörer har lyckats ta emot telemetri på 435 och 436 MHz. Det är dock inte enkelt, det kräver en del gain i antennerna och en ganska komplicerad uppsättning programvara för att avkoda telemetri.

Det finns mycket bra information på DK3WNs sida om DSLWP. Jag hänvisar det istället för att översätta allt till svenska.
Frekvensen som gäller för DSLWP-B är 435.400/436.400 MHz, modulation är 250/500 bps GMSK/JT4G.

First Amateur Radio Transmissions from Lunar Orbit and Subsequent
Test Plan

On 2 Jun and 3 Jun we had 2 successfully tests on the UHF downlink
of DSLWP-B after lunar orbit insertion. BY2HIT and PI9CAM team
successfully decoded 39 GMSK packets from the satellite. SP5ULN and
M0IEB also detected signals from the satellite with much smaller
antenna, but the decode was not fully successful.

Two weeks ago, when the satellites were launched on 20 May, UHF
signals from both satellites was received by PY2SDR, CD3NDC, PY4ZBZ
and N6RFM.

The subsequent tests are planned from 4 Jun 22:00 UTC to 5 Jun 00:00
UTC, and from 5 Jun 08:00 UTC to 5 Jun 10:00 UTC. The mode is 250 bps
GMSK for both 435.4 MHz and 436.4 MHz.

Tracking file updates can be found on:
https://github.com/bg2bhc/dslwp_dev or
http://lilacsat.hit.edu.cn/tle/program_tracking_dslwp-b.txt

[ANS thanks Wei BG2BHC for the above information]

Den 11 maj 2018 släpptes tre nya Cubesats ut från ISS med amatörradio ombord. Alla dessa tre har rapporterats bla. via DK3WN. Frekvenser enligt följande:

1KUNS-PF (Kenya)- NORAD CAT ID 43466 (a 3U cubesat with a 1200 bps or 9600
bps telemetry beacon at 437.300 MHz)

UBAKUSAT (Turkey)- NORAD CAT ID 43467 (a 3U cubesat with a CW beacon at
437.225 MHz, a telemetry beacon at 435.325 MHZ, and a linear transponder
with a 435.200 – 435.250 MHz downlink / 145.940 – 145.990 MHz uplink)

Irazu (Costa Rica) – NORAD CAT ID 43468 (a 1U cubesat with a 9600 bps
telemetry beacon at 436.500 MHz)

Källa: ANS-147

Behöver du äldre keplerelement? AMSAT-NA har ett arkiv för detta. Se nedan:

25 Year Archive of Keplerian Elements Now on AMSAT Web Site

AMSAT Orbital Elements Manager Ray Hoad, WA5QGD    has made his archive
of orbital elements for active amateur satellites back to October 1993.
Joe Fitzgerald, KM1P has posted this on the AMSAT web site at:
http://www.amsat.org/tle/historical/   Joe commented, “Thanks for all
those bulletins, Ray. That represents a lot of work over 25 years!”

[ANS thanks Ray Hoad, WA5QGD and Joe Fitzgerald, KM1P for the above
information]

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]