Author: SM0TGU

Webmaster and member of the AMSAT-SM steering group.

Categories
Hamradio from ISS

Mer SSTV från ISS 30-31 juli 2018

Det kommer ännu mera SSTV-sändningar från ISS på 145.800 MHz FM den 30 och 31 juli 2018. Läs mer:

ARISS Russia is planning another of their popular MAI Slow Scan Television (SSTV) experiment events. Transmissions are scheduled to begin at 16:00 UTC on July 30, then powered down at 19:30 UTC. The next day (July 31), the system will be active from 13:25-19:15 UTC. Downlink should be on the traditional 145.80 MHz frequency and the operating mode will likely be PD120.

When this event becomes active, SSTV images are downlinked from the International Space Station (ISS) at the frequency of 145.80 MHz and can be received using ham radio equipment as simple as a 2 meter handheld radio or a common scanner receiver the covers the 2 meter ham band. After connecting the audio output of the radio receiver into the audio input of a computer running free software such as MMSSTV, the SSTV images can be displayed.

Please note that the event is dependent on other activities, schedules and crew responsibilities on the ISS and are subject to change at any time.
Please check for news and the most current information on the AMSAT.org and ARISS.org websites, the AMSAT-BB@amsat.org, the ARISS facebook at Amateur Radio On The International Space Station (ARISS) and ARISS twitter @ARISS_status.

About ARISS
Amateur Radio on the International Space Station (ARISS) is a cooperative venture of international amateur radio societies and the space agencies that support the International Space Station (ISS). In the United States, sponsors are the Radio Amateur Satellite Corporation (AMSAT), the American Radio Relay League (ARRL), the Center for the Advancement of Science in space (CASIS) and National Aeronautics and Space Administration (NASA). The primary goal of ARISS is to promote exploration of science, technology, engineering, and mathematics (STEM) topics by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students in classrooms or public forms. Before and during these radio contacts, students, educators, parents, and communities learn about space, space technologies, and amateur radio. For more information, see www.ariss.org.

Also join us on Facebook: Amateur Radio on the International Space Station (ARISS)

Follow us on Twitter: ARISS_status

Dave Jordan, AA4KN
ARISS PR

Categories
Hamradio from ISS

SSTV från ISS fortsätter på 145.800 MHz

SSTV-sändningarna från ISS fortsätter ett tag till på 145.800 MHz. De kör mycket effekt och det går att lyssna på en handapparat.

SSTV transmissions from the Russian Service module on the
International Space Station started June 29 on 145.800 MHz FM and
they are still continuing

There may well be further transmissions up until July 13 when the
equipment being used for the SSTV will be required for a school
contact.

David Boult G7HCE in Exeter noted that some adjustments have been
made by the cosmonauts and the images are now being sent uncropped.
For the first week the edges of the pictures were missing.

The images commemorate the various satellites that were hand-
deployed from the ISS. These will include the first satellite
deployment from ISS: Suitsat-1/Radioskaf-1 which was developed by
ARISS and deployed in February 2006.

The transmissions are being made on 145.800 MHz FM using the PD-120
SSTV mode.

Note the ISS transmissions use the 5 kHz deviation FM standard
rather than the narrow 2.5 kHz used in Europe. If your transceiver
has selectable FM filters try using the wider filter. Handheld
transceivers generally have a single wide filter fitted as standard
and you should get good results outdoors using just a 1/4 wave whip
antenna.

The ISS Fan Club site will show you when the space station is in
range http://www.issfanclub.com/

ISS SSTV information and links at
https://amsat-uk.org/beginners/iss-sstv/

[ANS thanks Southgate ARN for the above information]

Categories
Ham Satellite news

145.825 MHz APRS Cubesats från ISS

Under augusti 2018 finns det möjlighet att tre satelliter med APRS släpps ut från ISS. De kommer att sända på 145.815 MHz och bör bli lätta att höra:

The June 29, 2018 SpaceX Falcon 9 launch of the Dragon cargo
capsule included cubesats of the BIRDS-2 satellite constellation.
All cubesats in the BIRDS-2 constellation MAYA-1, BHUTAN-1 and
UiTMSAT-1 have identical designs and utilize the same radio
frequencies. While independently made, the operation and control
of the three cubesats will be shared by the three teams after
they are released from the ISS early in August. They will be
operational for six months.

“The three will form a constellation, orbiting the earth from
different places. This will provide the countries more opportun-
ities to make measurements and run experiments, than just with
using one cubesat,” explained Joel Joseph Marciano Jr., manager
of the PHL-Microsat program in the Philippines.

The primary mission of BIRDS-2 CubeSat constellation is to
provide digital message relay service to the amateur radio
community by means of an APRS digipeater onboard. The APRS
digipeater onboard BIRDS-2 CubeSats will use 145.825 MHz for
both receive and transmit which isa standard configurations
used by other satellites such as ARISS and LAPAN-A2.

Another mission of the BIRDS-2 CubeSat constellation is to
demonstrate a store-and-forward (S&F) system. In this mission,
their goal is to investigate technical challenges through ex-
periments on appropriate data format, multiple access scheme,
file-handling protocol while complying with limited operational
time and power constraints.

The BIRDS-2 CubeSat S&F system will collect data from remote
ground sensors, store them onboard and download them to the
different BIRDS-2 ground stations network.

Additional experiments will use the BIRDS-2 CubeSat constellation
to enhance research and experiment in the fields of single latch-up
event detection, magnetic field measurements using a COTS aniso-
tropic magnetometer, and flight testing of a COTS GPS chip which
can be used for future CubeSat missions if proven effective. Stu-
dents will also explore a passive attitude stabilization mechanism
consisting of magnets and hysteresis dampers for proper orientation
of camera on a CubeSat. All measurements and image data will be
shared with the public on BIRDS-2 project website.

Moveover, BIRDS-2 CubeSat constellation will expand amateur radio
communication experiment on the operation of CubeSat constellation
via a network of UHF/VHF amateur radio ground stations (started
in the BIRDS-1 CubeSat constellation project). BIRDS-2 hopes to
promote awareness of amateur radio communication and amateur
satellites among the general public and students, especially in
the participating nations of BIRDS-2 Project: Bhutan, Malaysia,
Philippines, and Japan.

The IARU has coordinated 437.375 MHz CW beacon for a downlink and
145.825 MHz for the APRS experiment.

Philippine news coverage of MAYA-1 can be accessed at:
https://tinyurl.com/ANS189-MAYA-1
http://tinyurl.com/ANS-BIRDS2-cubesats
Visit the BIRDS-2 website at: http://birds2.birds-project.com/

[ANS thanks the BIRDS-2 Project, Kyushu Institute of Technology and
the IARU for the above information]

Categories
Hamradio from ISS

ARISS news

Some ARISS news to share

Several upcoming ARISS events:

ARISS-Russia, in collaboration with the Southwest State University in Kursk, Russia, are developing a series of educational CubeSat satellites called Tanusha. Two Tanusha CubeSats were developed by students at Southwest State University and were hand-deployed by cosmonauts during an August 2017 extravehicular activity. These two CubeSats are performing cluster flight experiments through communications links. A second set of CubeSats, Tanusha 3 & 4 were launched earlier this year and are currently on-board ISS.  Tanusha 3 & 4 are planned to be hand deployed by Cosmonauts in August.  They will perform even more comprehensive cluster flight objectives than Tanusha 1 & 2.

On June 20, Tanusha 3 will be connected to one of the ARISS Service Module antennas and will transmit from 0730-1200 UTC on 437.05 MHz.  These FM transmissions will include greetings from students in several languages, including Russian, English, Spanish and Chinese.  On June 21, Tanusha 4 will be connected to one of the ARISS Service Module antennas and will transmit from 0730-1200 UTC on the same frequency:  437.05 MHz.  The ARISS-Russia team plan to also retransmit these signals on the standard ARISS 2-meter downlink, 145.80 MHz using the JVC Kenwood D700 radio that is still on-board ISS.  All are invited to listen to the CubeSats from ISS on 437.05 and/or 145.80 MHz.

The next SSTV image downlinks are planned for June 29-July 1.  These images will commemorate the various satellites that the ARISS team has developed and hand-deployed from the ISS.  These will include the first satellite deployment from ISS:  SuitSat-1/Radioskaf-1 which was deployed in February 2006.  More details on this will be forthcoming as the date draws near.

We thank ARISS-Russia delegate Sergey Samburov, RV3DR for this latest information.

73,  Frank Bauer, KA3HDO

Werner-Heisenberg-Gymnasium, Leverkusen, Germany, direct via DLØIL and Schickhardt-Gymnasium, Herrenberg, Germany, direct via DLØSGH

The ISS callsign is presently scheduled to be DPØISS
The scheduled astronaut is Alexander Gerst KF5ONO
Contact is a go for: Wed 2018-06-27 10:32:19 UTC 62 deg

Categories
Ham Satellite news

CAMSAT planerade satelliter med HF-transponder

Nu kan det åter igen bli aktuellt med HF-transpondrar på amatörradiosatelliter. Det är CAMSAT (China’s Amateur Radio Satellite organization) som planerar två nya satelliter varav en med HF. Det är en mycket intressant kombination av frekvenser. Läs mera nedan:

CAMSAT, China’s Amateur Radio Satellite organization, has offered
additional details about the three Amateur Radio satellites it
plans to launch later this year. Two of the satellites, designated
CAS-5A and CAS-6, will carry transponders, and one of them will
offer HF capability. CAMSAT’s Alan Kung, BA1DU, told ARRL that
the 6U CAS-5A will carry two HF transponders and two V/UHF trans-
ponders. The plentiful equipment package includes an H/T (21/29 MHz)
mode linear transponder, an H/U (21/435 MHz) mode linear transponder,
an HF CW telemetry beacon, a V/U linear transponder, a V/U FM trans-
ponder, a UHF CW telemetry beacon, and UHF AX.25 4.8k/9.6k baud GMSK
telemetry.

+ The H/T mode linear transponder will have a 30 kHz wide uplink centered
on 21.400 MHz, and a downlink centered on 29.490 MHz. RF output is 0.5 W.

+ An HF CW telemetry beacon will transmit on 29.465 MHz with 0.1 W.

+ The H/U mode linear transponder will have a 15 kHz wide uplink centered
on 21.435 MHz, and a downlink centered on 435.505 MHz. The RF output is
0.5 W.

+ The V/U mode linear transponder will have a 30 kHz wide uplink at
145.820 MHz, and a downlink at 435.540 MHz. The RF output is 0.5 W.

+ The V/U mode FM transponder will uplink at 145.925 MHz, and downlink
at 435.600 MHz. The transponder passband is 15 kHz, and the RF output
is 0.5 W.

+ The UHF CW telemetry beacon will transmit on 435.570 MHz, with an RF
output of 0.1 W.

+ UHF AX.25 4.8k/9.6k baud GMSK telemetry will transmit on 435.650 MHz
at 0.5 W.

Kung told ARRL that the HF, VHF, and UHF antennas are quarter-wave
monopoles.

A satellite within a satellite, the tiny CAS-5B, weighing 0.5 kilogram,
will be deployed from CAS-5A in orbit. It will carry a UHF CW beacon on
an Amateur Radio frequency. Both CAS-5A and CAS-5B will be placed into
539 × 533 kilometer, 97.5° orbits. They will launch from the Jiuquan
Satellite Launch Center in late September.

The 50-kilogram CAS-6 microsat will include a VHF CW telemetry beacon,
a U/V mode 20 kHz linear Amateur Radio transponder, and AX.25 4.8k baud
GMSK telemetry. It will also carry an atmospheric wind detector and
other systems that will operate on non-amateur frequencies.

A launch at sea on an as-yet undetermined date is planned for CAS-6
from the China Academy of Launch Vehicle Technology. The microsat will
be placed into a 579 × 579 kilometer, 45° orbit.

[ANS thanks ARRL for the above information]

Categories
Hamradio from ISS

ISS Ham Video transmitter still defective

From ARISS mailing list:

Mid April, the Ham Video transmitter onboard Columbus stopped working. June 1st 2018, an extensive test was performed by crew. This test comprized connecting the transmitter to the second ARISS L/S-band patch antenna on the nadir of Columbus.  The test was negative. Ground stations didn’t receive any signal from Ham Video. Presently, ARISS is planning to download the transmitter for repair. Onboard, repair is impossible. We hope this plan will be accepted by the space agencies and the cost of operations funded by sponsors.

Schools and crewmembers performing educational ARISS school contacts are delighted to use Ham Video. We will do the best we can to restart this service as soon as possible.
We will keep you informed on progress.
73,
Gaston Bertels, ON4WF
ARISS HamTV