Category: Ham Satellite news

12:e februari kan det vara dags för två nya satelliter med amatörradio. ChubuSat-2 och ChubuSat-3 heter dessa och har frekvenser enligt följande:

ChubuSat-2 Satellite
Uplink:   145.815 MHz FSK  1200bps
Downlink: 437.100 MHz GMSK 9600bps

ChubuSat-3 Satellite
Uplink:   145.840 MHz FSK  1200bps
Downlink: 437.425 MHz GMSK 9600bps

Fakta från ANS-038:

Nagoya University(NU) and Mitsubishi Heavy Industries(MHI) developed 50kg
microsatellite ChubuSat-2(NU) and ChubuSat-3(MHI). These satellites have
amateur VHF receiver and amateur UHF transmitter, and will be launched on
Feb. 12 2016 from Tanegashima, Japan. Komaki Amateur SATCOM Club operates
these satellites from Komaki, Japan.

After the satellite separation, each satellite will transmit UHF CW beacon
message including battery voltage etc. which is very important information
for our initial and critical operation. So we are very happy if you receive
the CW beacon message and report to us
chubusat2@frontier.phys.nagoya-u.ac.jp

In following WEB site, we show the information(frequency, format, TLE, etc.)
about ChubuSat-2 and ChubuSat-3. If we have your report, we will show your
report in this page.

https://www.frontier.phys.nagoya-u.ac.jp/en/chubusat/chubusat_satellite2.html

Both satellite will provide the message exchange service. After the on-orbit
checkout of the satellite(maybe one month after launch), you can use this
service, sending your message with VHF uplink, then your message is written
to the on-board memory. By sending inquiry message, anyone can read your
message with UHF downlink.

ChubuSat-2 Satellite
Uplink:   145.815 MHz FSK  1200bps
Downlink: 437.100 MHz GMSK 9600bps

ChubuSat-3 Satellite
Uplink:   145.840 MHz FSK  1200bps
Downlink: 437.425 MHz GMSK 9600bps

The uplink/downlink format will be uploaded in above WEB site.

We hope you get interested in our satellites, receive beacon messages, and
enjoy the message exchange service.

Best regards,

Yasutaka Narusawa (JR2XEA)

[ANS thanks Yasutaka Narusawa, JR2XEA, and the KOMAKI Amateur SATCOM Club
for the above information]

Video från när AggieSat-4 släpptes från ISS.

Fredag den 29 januari (2016) släpptes satelliten AggieSat4 ut från ISS. Efter ett par varvs tystnad hördes dess beacon/telemetri starkt av flera radioamatörer.

AggieSat4 kommer efter ett tag att släppa ut en mindre satellit kallad Bevo-2. De två satelliterna kommer att kommunicera mellan varandra och markstationen.

Följande frekvenser gäller och enligt rapporter hörs AggieSat4 bra:

• AggieSat4 436.250 MHz 9k6 FSK telemetry (även möjlighet till 153.6 kbps FSK)
• Bevo-2 437.325 MHz CW and 38k4 FSK.

Mycket mer info finns hos AMSAT-UK.

Enligt nedanstående är transpondern igång denna vecka:

On December 21, 2015 at 1038 UT, the EO-79 transponder was turned on for a
prolonged period.

The FUNcube transponder subsystem on QB50p1 (EO-79) had been provided by AMSAT-
UK and AMSAT-NL and is a similar subsystem as on FUNcube-1, but without the
telemetry downlink circuitry.

The current software running on EO-79 does experience occasional reboots. When
these reboots happen, the transponder is automatically turned off and will have
to be turned back on by a command station. The FUNcube team has selected a few
command stations to do so, but be advised the transponder may be off.

TLEs:
AMSAT keps name: EO-79
Celestrak keps Name: QB50P1
Celestrak file: cubesat.txt
NORAD #    40025
COSPAR designator    2014-033-R

Frequencies:
*Uplink:* 435.035-435.065 MHz LSB [See note below]
*Downlink:* 145.935-145.965 MHz USB

EO-79 has been set to only beacon the normal AX.25 beacon every 30 seconds
instead of 10 seconds. The beacon frequency is 145.815 MHz and consists of AX.25
frames on BPSK. More details about the downlink can be found on the ISIS Ham
Radio page at http://isispace.nl/HAM/qb50p.html

We kindly request you to share your experiences with the AMSAT Bulletin Board so
everyone can benefit from operating tips and tricks, as well as being up-to-date
on the status.

We would also welcome any observation related to the transponder behaviour when
the AX.25 beacon comes on.

Just like FUNcube-1, the crystal oscillator circuits exhibit drift with
temperature. This means manual tuning will probably work best.

Mike Seguin N1JEZ notes:  I found my downlink after setting my uplink +12 kHz
from published spec

SatPC32 tracking software Doppler SQF information used by Peter VK4NBL:
EO-79,145950,435063,USB,LSB,REV,0,0
EO-79,145814.8,435070,CW,TELEMETRY,0,0

Lastly, the commanding team will not be available over Christmas, so the current
activations are planned from today until Thursday 24th and from Monday 28th
until Thursday 31st

[ANS thanks Wouter, PA3WEG, and AMSAT-UK for the above information]