Nov 11 2018

First CubeBel-1 telemetry 2018-11-11

@EU1SAT @BsuSat My first CubeBel-1 decode and uploaded to Bsusat web. The following equipment was used:

  • Antenna 13 el Vårgårda UHF Yagi, vertical
  • LNA Mini-70 from SHF-Elektronik
  • Rotor el/azi RAS  from SPID Elektronik
  • 16m RFC 400 low loss coax
  • Airspy Mini
  • SDR-Console V3
  • High-Speed Soundmodem by UZ7HO
  • Online Telemetry Forwarder by DK3WN. Server set to bsusat.com
  • PstRotator for controlling rotor
  • And maybe some more software…

Frq for RX was 436.990 MHz Wide FM, data stream sent as FSK G3RUH 9600bd. Everything was received and decoded fully automatic while I was doing dinner for my kids 🙂

By • Telemetri • 0

Nov 10 2018

PW-Sat2 under november 2018

Intressant satellit från Polen – PW-Sat2. Notera att de har mycket bra information för radioamatörer:

Polish satellite – PW-Sat2 is scheduled as soon as early as 19th
November 2018 launch of 4. . It’s primary mission is a technological
tests of sail-based deorbit system. The PW-Sat2 is one of the
payloads in
SpaceFlight SSO-A The SmallSat Express mission aboard SpaceX’s Falcon
9 rocket. Please be advised that planned launch date may change since
it’s quite common for orbital rockets launches – be prepared and
follow our socials!

Radio link

The satellite is equipped with full duplex communication module
TRxVU Rev. B from Innovative Solutions in Space BV. It operates in
amateur bands UHF (downlink) and VHF (uplink). Antenna module
consists of two dipole antenna (for uplink/downlink) with linear
polarisation. Downlink power equals to 27 dBm (0.5 W). Downlink
signal utilizes BPSK modulation, data scrambling according to G3RUH
and AX.25 protocol. By default, the satellite transmits its downlink
signal at 1200 bps, however it might be changed on request by the
OPERation team (via uplink telecommand) up to 9600 bps. Currently set
bitrate will be published on PW-Sat2’s Twitter profile, however
determination of actual bitrate should be fairly easy by looking at
signal spectrum.

What data will be transmitted?

Every 60 seconds the satellite transmits a beacon frame full of
telemetric data. 229-bytes long payload of the beacon frame contains
the most important information about satellite’s state – among others
– temperatures of main subsystems, battery voltage, solar power, on-
board computer mission time and experiments state. Other data, such
as historical telemetry, experiments data, photos from cameras will
be send on request from PW-Sat2’s OPERation team. There is one
exception from this rule – deorbit sail experiment will transmit its
results on-line (since after sail deployment random tumbling is
expected to occur resulting in signal loses and solar energy
decrease). Downlink signal of PW-Sat2 will be opened for everyone to
receive, decode and interpret data!

HAM radio tools to receive PW-Sat2

HAM radio community plays important role in almost every cubesat
mission – receiving and sharing acquired signal with satellites’
owners. Our team has prepared set of tools helping in receiving and
demodulation of PW-Sat2 radio signal and upload to cloud-based
service afterwards. We believe that data shared to us by community
will have big impact on our mission.

Prepared desktop application is available on Linux and Windows
platforms (however Ubuntu Linux is the main supported OS). It allows
for signal reception utilizing software defined radio receivers
(SDR): RTL-SDR, FUNcube Dongle Pro+, ADALM-Pluto SDR as well as
“traditional” analogue radio receivers with single sideband
demodulator (SSB) via computer’s line-in. Acquired signal from radio
receiver is demodulated and deframed. Correctly received frames are
classified by means of their type and uploaded to cloud-based
application (radio.pw-sat.pl) prepared thanks to co-operation with
SoftwareMill company. The cloud-based application allows for frames
collection, sharing and telemetry decoding (for beacon frames,
labeled as “telemetry frame”). There are available additional
features like charts presenting the most important telemetry data.

How to start receiving?

Detailed information are available in our Wiki –
https://github.com/PW-Sat2/HAMRadio/wiki. A good starting point is to
take a look at “Quick start guide”. The wiki pages will be updated as
new information (e.g. about orbit, TLE data) will be available.

We encourage to try the software (desktop and cloud parts) right
now! In case of any problems – don’t hesitate to mail us (by an e-
mail, Messenger, in comment etc.), create an issue on GitHub
(https://github.com/PW-Sat2/HAMRadio/issues) or simply ask in this
thread!

Mission status information

Up to date information about mission status will be published on our
Twitter profile – don’t miss anything, follow us now!

Contests

To encourage you to listen to PW-Sat2 and honour your contribution
we would like to issue QSL cards for every HAM radio who will send us
(to radio.pw-sat.pl) at least one correct PW-Sat2 frame.

Additionally we’ve prepared contest in three categories:
* the first received and uploaded frame,
* the last received and uploaded frame,
* the most received and uploaded frames.

Shortly after mission we will reveal the winners and honour with
packs of PW-Sat2-related gadgets!
For more about contests see (https://pw-sat.pl/en/ham-contest/).

[ANS thanks MGUMIELA via QRZ.com for the above information]

By • Satellitnyheter • 0

Nov 8 2018

Att köra PSK31 via PSAT NO-84

Scott, K4KDR har gjort några bra noteringar om hur man kör PSK31 via PSAT:

 

Hi everyone.

If you would like to make some satellite contacts using a digital mode that
doesn't require linux, it turns out that the PSK31 transponder on PSAT
(NO-84) works very well.

A few days ago I posted that I had successfully used PSAT's PSK31
transponder:

http://www.amsat.org/pipermail/amsat-bb/2018-November/070178.html

I had always seen in the documentation that the 435.350 FM downlink from
PSAT transmitted PSK31 and I had even decoded its telemetry beacons using
FLDigi.  However, until a new How-To came out last week, I had never
figured out how to use the 10m USB PSK31 uplink to add my own signal to
PSAT's 70cm downlink stream.

Here is that excellent How-To from 2M0SQL:

https://www.2m0sql.com/2018/10/29/using-the-no-84-psat-psk-transponder/

... and I am making this post to share a couple of additional notes.
Please forgive if this is old news, but it was new to me.

I have uploaded some screen shots to illustrate.  First, please note the
bottom waterfall in this image showing -2- PSK31 streams in PSAT's downlink:

https://www.qsl.net/k/k4kdr//how-to/psat-psk31/fldigi-decoding.png

... the stream at the 310 Hz. mark is PSAT's telemetry beacon, but the mark
at 2369 is a repeat of what I am transmitting on 28.120!

Since the key to this is FLDigi's ability to decode multiple streams at the
same time, it's extremely helpful to SEE each of those streams separately.
In the following image, please note how to enable the left-hand "channels"
browser window in FLDigi:

https://www.qsl.net/k/k4kdr//how-to/psat-psk31/fldigi-view-channels.png

... and this is a matter of personal preference, but I find that the most
helpful display setting in that left-hand window is to label each stream
with the audio frequency it's on:

https://www.qsl.net/k/k4kdr//how-to/psat-psk31/fldigi-freq-view-settings.png

... when you click on any of those decode streams, that selects which
stream appears in the main upper decode window in FLDigi.

So that's the decode side of this.  If you combine that with the
information provided in the How-To by 2M0SQL on how to transmit, we ought
to be able to get some 2-station or even multi-station QSO's logged.

Finally, if you don't have 10m transmit capability -or- even if you only
own an FM radio, this is a digital mode that you can absolutely decode to
enjoy another aspect of one of our long-orbiting satellites.

If you would like to practice using FLDigi to decode the PSK31 signals from
PSAT, here is the audio file that produces the two streams you see in the
screen shots I have mentioned above:

https://www.qsl.net/k/k4kdr//how-to/psat-psk31/psat-psk31-sample-audio.wav

-Scott,  K4KDR

By • Tekniska inlägg • 0

Nov 7 2018

Utlottning av LNB för Es’hail-2

Inför uppskjutningen av Es’hail-2 lottar AMSAT-SM ut en (1) LNB av typ Octagon Optima Twin Slim Oslo. Detta är enligt många en utmärkt LNB att använda för Es’hail-2 vilket går att läsa på detta forum. Reglerna för utlottningen är följande:

  • Du måste vara medlem i AMSAT-SM (vilket är kostnadsfritt och kan göras här)
  • Sista dag för att deltaga är 24 november 2018
  • Om du vinner kommer du få LNB levererad direkt hem så det är viktigt att dina uppgifter är korrekta
  • Observera att det inte är en komplett mottagare, du måste själv bygga ihop en lösning. AMSAT-SM kan inte hjälpa till med detta men det finns många artiklar ute och vi kommer kontinuerligt att publicera länkar till byggbeskrivningar när det finns tillgängligt

Tävlingen avslutad. Grattis SM5EPC Anders Jonsson som är vinnaren!

 

By • Medlemsnyheter • 0 • Tags:

okt 27 2018

Bugsat-1 telemetry 2018-10-27

A lot of local QRM on 437 MHz…

By • Telemetri • 0

okt 27 2018

QO-100 Es’hail-2 P4-A Transponder Band Plan och info

Uppdaterad: 2019-03-17 mer info fylls på allt eftersom, bla. kommer vi att länka till lämplig utrustning

Länkar

Aktuella länkar för mer information:

Bandplan

Gällande publicerad bandplan är följande (all information kommer från AMSAT-DL):

En annan översikt på bandplanen är nedanstående. Observera att transponderna är icke inverterande:

Frekvenser

Kom ni ihåg Leila från Oscar 40? Kanske inte, det var länge sedan. Men Leila finns med på Es´hail och är alltså en detektor som indikerar för stark signal på upplänken med en ton på nerlänken.

Uplink [MHz]Downlink [MHz]Bandwidth available [kHz]Notes
 10,489.550 to 10,489.555do not transmitLower Beacon, 400 bits / s BPSK or CW
2400.055 to 2400.10010489.555 to 10489.60045CW Only
2400.100 to 2400.12010489.600 to 10489.62020narrowband digital modes (500 Hz. Max BW)
2400.120 to 2400.14010,489.620 to 10,489.64020digimodes (2700 Hz max. BW)
2400.140 to 2400.19010489.640 to 10489.69050mixed modes (. 2700 Hz max BW)
2400.190 to 2400.29510489.690 to 10489.795105SSB only
 10489.795 to 10489.800do not transmitUpper Beaconsfield, 400 bits / s BPSK or CW
  • NO FM mode is allowed on the transponder.
  • No transmission below the lower beacon and no transmission above the upper beacon.
  • The NB transponder is a bent-pipe transponder and non-inverting.
  • Uplink polarization is RHCP (right-hand circular polarization).
  • Downlink polarization for the NB transponder is V (vertical linear polarization).
  • Monitor the beacons and keep your own signal level below, otherwise you might trigger LEILA warnings.
  • Please use minimum uplink power (ERP).
  • The beacons are modulated in 400 bit / s BPSK (similar to the P3 satellites) or in CW.
  • The beacons are generated in the ground station and will Provide selected telemetry from the main satellite related to our amateur radio transponder.

Utrustning

Här kommer länkar till lämplig utrustning att presenteras:

Täckningskarta

Täckningskartorna nedan är imponerande, bara att njuta!

By • Satellitnyheter • 0 • Tags:

okt 27 2018

Es’hail-2 P4-A specialbevakas

Es’hail-2 P4-A specialbevakas nu på amsat.se med en egen tag och att inläggen lyfts fram. För övrigt har en del äldre kategorier tagits bort och ersatts med taggar, tex. AO-40.

By • Ändringar på amsat.se • 0

okt 21 2018

1KUNS-PF telemetry 2018-10-21

My first 1KUNS-PF RX. 13 el yagi and a lot of software 🙂

By • Telemetri • 0

okt 20 2018

FUNcube Operational Status Update

Complete FUNcube status (aktuell FUNcube status över samtliga satelliter):

Graham Shirville, G3VZV has posted the current status of the AMSAT-UK
FUNcube series of satellites.

FUNcube-1 (AO-73)
—————–
As you will know, AO73/FUNcube-1 has been in full sunlight for over
one month and has been transmitting continuously high power telemetry
for most of that time. This has now been changed to full time amateur
mode so the transponder is once again available. With the more stable
on board temperatures being experienced, this means that the transpon-
der frequencies are also now more stable. We expect to leave it in this
mode for some weeks so that the team can determine whether or not the
currents flowing from the solar panels are having any noticeable effect
on the spin period.

Uplink: 435.150 – 435.130 MHz CW, LSB
Downlink: 145.950 – 145.970 MHz CW, USB
Beacon: 145.935 MHz 1k2 BPSK

FUNcube-2 (UKube-1)
——————-
The FUNcube-2 transponder on UKube-1 continues to be in full time
transponder mode. There are occasional breaks in service for a few
seconds when the OBC reboots and the other onboard transmitter sends
its CW beacon.

Uplink: 435.080 – 435.060 MHz CW, LSB
Downlink: 145.930 – 145.950 MHz CW, USB
Beacon: 145.915 MHz 1k2 BPSK

FUNcube-3 (EO-88 Nayif-1)
————————-
EO88/Nayif-1 continues to perform nominally with high power telemetry
when in sunlight and amateur mode when in eclipse.

Uplink: 435.045 – 435.015 MHz CW, LSB
Downlink: 145.960 – 145.990 MHz CW, USB
Beacon: 145.940 MHz 1l2 BPSK

With their slightly different orbital characteristics it is useful that
AO73 is now the early bird, EO88 comes over in the mid morning and UKube
provides coverage in the afternoon.

We have been suffering from some network issues in relation to upload-
ing the telemetry from the Dashboards to the Data Warehouse over the
past couple of weeks. Apologies for this, but hopefully everything is
now stable again. ie fingers are still crossed. Thank you for all the
telemetry that you upload.

Like many other teams, we are presently waiting for the next Space-X
launch from Vandenberg which is expected to be carrying a number of new
amateur payloads, These will provide additional transponder and STEM
capabilities for the amateur satellite service. Exciting times ahead.

[ANS thanks Graham Shirville, G3VZV and AMSAT-UK for the above information]

By • Satellitnyheter • 0

okt 20 2018

Upcoming ARISS Contact Schedule as of 2018-10-17

Hörbara i Sverige:
 Quick list of scheduled contacts and events:

Integrierte Gesamtschule Osterholz-Scharmbeck, Osterholz – Scharmbeck, Germany and Gymnasium Soltau, Soltau, Germany, direct via DN3HB and DN5ABG

  • The ISS callsign is presently scheduled to be DPØISS
  • The scheduled astronaut is Alexander Gerst KF5ONO
  • Contact is a go for: Tue 2018-10-23 09:14:26 UTC 63 deg (***)

Martin-Andersen-Nexö-Gymnasium Dresden/DLR_School_Lab TU Dresden, Dresden, Germany, and Liborius-Gymnasium Dessau, Dessau-Roßlau, Germany, direct via DLØTSD and DKØLG

  • The ISS callsign is presently scheduled to be DPØISS
  • The scheduled astronaut is Alexander Gerst KF5ONO
  • Contact is a go for: Wed 2018-10-24 08:22:55 UTC 78 deg (***)

By • Amatörradio från ISS • 0

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