Kategorier
Satellitnyheter

Update on the Status of RadFxSat-2 / Fox-1E

From ANS-024:
RadFxSat-2 was launched Sunday, January 17, on Virgin Orbit
LauncherOne launch vehicle. Reports from the launch provider stated
that telemetry confirmed that the deploy commands had been sent and
that all of the doors opened successfully, resulting in payload orbits
that were all within the ICD limits.

Nominally, we expected to see “First (digital) Veronica” from the
RadFxSat-2 telemetry beacon commencing 54 minutes after our deployment
from the launch vehicle. That did not occur as expected.

For each of our launches, we follow a number of steps documented in
the “In Orbit Checklist” (IOC) spreadsheet. Confirmation of launch
and deployment are the first steps and then, confirmation of beacon
reception. All other steps follow that but there are steps in case of
anomaly, beginning with the detection of the beacon.

As always, from the moment we are deployed we look for signs of the
beacon through the ears of amateur radio operators and other means,
SatNOGS and webSDR to name a few. The antenna deployment and full
start of the IHU to bring up the beacon can occur anywhere around the
globe. AMSAT greatly appreciates the ongoing and reliable help we
receive from you and it is by far the best satellite ground network
even beyond that of many commercial players, for LEO orbits.

Command coverage is limited to the United States for various reasons
including regulatory requirements, so the opportunity to exercise the
steps of the IOC occurs a few times per day as the orbit passes over
us.

With no sign of the beacon after a few orbits offering good footprints
for reception, we proceeded with the contingency steps to verify the
presence of or activate the beacon. This past week our Engineering
and Operations Team members have been at work literally 20 hours per
day exercising all of the contingencies outlined in the IOC steps.
These steps have grown and matured with each launch of a Fox-1 program
CubeSat and are tailored to the specific satellite. RadFxSat-2, while
she may seem to be much the same as the others with the exception of
the transponder vs. FM radio, does present a number of variations to
be included in the IOC. As the results of those steps were exhausted
with no beacon detected, we added meetings and increased emails
including all of our engineers to discuss possible causes by any of
the systems and to develop further steps.

From those we drew new steps of command sequences that might overcome
whatever anomaly existed and make the beacon heard. As the week drew
on, we continued brainstorming and steps to activate other functions
that would provide proof of life. We continue to do so today and for
whatever time until we exhaust all possibilities that we are able to
draw from the expertise and satellite experience of our Engineering
Team and Operations Team drawing from the design of RadFxSat-2 and
lessons learned in the Fox-1 program as well as any from missions
prior to AMSAT’s first CubeSats.

AMSAT still needs your help as always, to help detect any sign of
activity from RadFxSat-2. This includes ability to listen for local
oscillators or transponder driver output in the case of a failed PA.

I personally ask that those of you who are and have been interested in
the entire process of bringing a new amateur radio satellite to orbit
and through end of life to continue to contribute your curiosity and
enthusiasm in exploring from your own station, to pursue the
possibilities of a successful RadFxSat-2 mission along with us. I
have received reports and queries from some of you, and I greatly
appreciate your contributions. You are in fact volunteers in the
AMSAT Engineering Team through your contribution.

If you are interested, I ask that you do due diligence in your
procedure if you think you have identified a signal by re-creating (if
possible) and verifying to yourself that what you have is credible, as
we do, before contacting us. That “standard” procedure is what adds
value by making the information actionable rather than placing the
onus of determining if it is even real upon us, because we are of
course quite busy with that already. Please email your findings to
foxtelem@amsat.us and allow us a day or two to acknowledge and/or
reply.

While we tend to talk about our involvement with RadFxSat-2 above all,
a real effect reaches outside our mutual desire for amateur radio
satellite fun. RadFxSat-2 is sponsored by Vanderbilt University as
part of our long partnership going back to Fox-1A. RadFxSat-2’s
mission belongs to Vanderbilt University as part of their RadFX series
of missions seeking to verify and explore radiation effects on COTS
components. Their mission coincides well with AMSAT’s desire to fly
lower cost satellite missions using COTS components, in the unfriendly
radiation environment of Earth orbit and beyond. Vanderbilt also
sponsored the CSLI for RadFxSat (one) in our Fox-1B spacecraft back in

  1. Their proposal was selected by NASA, flown on the ELaNa XIV
    mission in November of 2017.

RadFxSat’s mission was very successful in the information provided
through the combined telemetry-gathering of all of those who pursue
our missions through FoxTelem. Vanderbilt University published their
results giving praise to AMSAT and our Fox-1 CubeSats. The experiments
we host are built by students and Vanderbilt shares the experiences
with the educational community in their area. That is a success for
AMSAT as well in our goal to provide STEM and other educational
contributions.

While the RadFxSat-2 mission is problematic at this time, we will
pursue every possibility to make her work for the amateur community
and for our partner. I certainly hope to continue our partnership
with Vanderbilt, the mutual benefit is a wonderful and fun undertaking
that adds to the value of our satellites.

Kategorier
Teknik och hårdvara

Transceivers for Amateur Radio Satellites

IC-9700

This is a list of VHF/UHF transceivers that can be used for Amateur Radio Satellites. At the moment I choose only to list:

  • Rigs that have both VHF and UHF (HF as bonus) and all mode
  • Full Duplex Base Station rigs
  • Non Full Duplex smaller rigs that can be used mobile or as portable

Many of the rigs are discontinued. FM only mobile rigs and handheld can be added later to this list but can be found on this page from 2017. In the table below the weight is listed, because that was data I was interested in when I did the summary. For all other data – please follow the link to RigPix. As you see Icom, Kenwood and Yaesu are the main brands.

This list will never be complete in any way but maybe can help if you looking for old used rigs. All info is from the excellent RigPix Database.

Full Duplex All Mode Base Station VHF/UHF transceivers

NameWeight (kg)Note
IC-820/8215.0
IC-9104.5
IC-97015.0
IC-97004.7D-Star, SDR
IC-910011.0HF
TS-7909.2
TS-20007.8HF
FT-736R9.0
FT-8477.0HF

Mobile or Portable All Mode VHF/UHF transceivers
(not full duplex, all has HF)

NameWeight (kg)Note
HS2<1SDR
IC-706MKIIG2.45
IC-70002.3
IC-71002.7 (with front panel)
IC-7051.1D-Star, SDR, Battery
See our posts about IC-705
FT-817/8181.17Battery
FT-100D3.0
FT-8572.1
FT-8973.9
FT-9914.3
Kategorier
Oscar-100

Icebreaker FS “Polarstern” on Oscar 100

From AMSAT-DL web:

A portable satellite station for the QO-100 geostationary satellite (Es’hail-2) was commissioned on the icebreaker FS “Polarstern” at 14:23 UTC on December 27, 2020, with an initial QSO between DP0POL/mm and DK3ZL. A very special experiment, originated from an idea of Felix DL5XL and Charly DK3ZL. AMSAT-DL spontaneously supported this project by providing a complete 6 Watt transverter radio station, as well as a 75 cm dish on a tripod.

https://amsat-dl.org/en/a-new-star-has-risen-on-qo-100/

Kategorier
Ändringar på amsat.se Medlemsnyheter

Medlemsstatus och internetaktivitet 2020

Här kommer en sammanfattning över medlemsstatus och AMSAT-SMs internet- och informationsaktivitet från 2020.

Medlemsstatus
AMSAT-SM hade vid årets slut​ 289​ medlemmar att jämföra med 268 medlemmar för 2019. Ingen har aktivt gått ur under året. Detta innebär att vi ökar vårt medlemsantal varje år. Sedan 2013 har vi fått 205 nya medlemmar vilket innebär att mer än två tredjedelar har registrerat sig de senaste sju åren.

Hemsidan och sociala medier
Via Twitter har vi en fortsatt stor ökning av följare – just nu (jan 2020) 1164 ​följare jämfört med ​668 ​följare i slutet av 2018.
Under året fick vår webbhotell-leverantör nya ägare och hemsidan flyttades därför rent tekniskt. För webbredaktören har det blivit något enklare att redigera och prestandan är även något bättre (snabbare svarstider).
I och med den nya webbhotell-leverantören har vi även fått en ny statistikfunktion, vilket gör att det inte går att jämföra värden från föregående år. Så här såg det ut under andra halvan av 2020 (notera ökningen under december):

Kostnaden för hemsidan är fortsatt sponsrad av Lars SM0TGU under flera år framåt.
Under december gjordes ett stort arbete med ny design för hemsidan vilket förhoppningsvis gör det enklare att hitta.


Kategorier
Teknik och hårdvara

Working satellites with IC-705 PstRotator SDR-Console

This is a guide how to working satellites with the IC-705 or similar rig. When trying to understand the IC-705 I needed to write down how to use it – so this is how this post was born. I will try to explain 3 different user scenarios, each have a case for FM- and linear satellites :

  • Working stand alone (portable) without computer control
  • Working with SDR-Console for doppler adjust and a SDR as receiver
  • Working with PstRotator for doppler adjust

The IC-705 satellite memory examples and file can be found here.
Please contact me if you see anything that will not work in the following user cases – I have limited knowledge.

Setting up PstRotator

I will not explain how to use and set up PstRotator – the PstRotator manual is very good. The settings for Omnirig is like this:

And a typical layout for PstRotator Satellites Tracking is like this (and for reference image for the text below):

Case 1: Using IC-705 stand alone without computer control

FM satellites

  • Select split memory for the satellite in IC-705.
  • If needed adjust the RX frequency with the VFO knob (look at the waterfall).
  • Adjust the TX frequency for doppler when transmitting with VFO knob. Use a printed frequency chart for help.

Linear satellites with SSB transponder
(I have never tried semi-duplex on linear satellites before so not sure if this works)

  • Select split memory for the satellite in IC-705.
  • Adjust the RX frequency with the VFO knob to find a free space on the transponder (look at the waterfall).
  • Adjust the TX frequency (press PTT and use the VFO knob) to the correct frequency on the uplink. Use a printed frequency chart for help.
Case 2: Using IC-705 with SDR-Console v3

In this case the IC-705 is working as the transmitter with full doppler control and a SDR as receiver, aslo with doppler control.

FM satellites

  • Select the uplink memory for the satellite in IC-705.
  • Start External Radio in SDR Console for doppler control – no need to do anything on the IC-705 – just transmit.

Linear satellites with SSB transponder

  • Select the uplink memory for the satellite in IC-705.
  • Adjust the RX frequency at SDR Console to find a free space on the transponder (look at the waterfall).
  • As SDR Console does not link up/downlink VFOs – adjust the TX frequency on the IC-705 with the VFO knob to the correct frequency on the uplink. Doppler is corrected also during TX. Use a printed frequency chart for help.
  • During changing frequency with the VFO knob, turn off the ”Doppler” adjustment in SDR-Console external radio, then turn it on again.
Case 3: Using IC-705 stand-alone with PstRotator

In this case PstRotator sets the correct frequency and mode on the IC-705 and has doppler control for both RX and TX. You are working IC-705 stand-alone as semi-duplex.

FM satellites

  • Select the satellite from PstRotator Favorites. Correct frequency, mode and subtone are now set in IC-705 VFOs.
  • Press the ”UP+DN” on PstRotator. Doppler is now adjusted on both RX and TX.
  • No need to do anything on the IC-705 – just transmit and listen.

Linear satellites with SSB transponder

  • Select the satellite from PstRotator Favorites. Correct frequency and mode are now set in IC-705 VFOs.
  • Press the ”UP+DN” on PstRotator and check that VFO linking are set to ”Reverse”. Doppler is now adjusted on both RX and TX and the VFOs are linked.
  • Adjust the RX frequency with the VFO knob to find a free space on the transponder (look at the waterfall). The TX is linked and will have correct frequency.
  • Change the VFO linking to ”Not linked” on PstRotator. This means that both TX and RX are still doppler adjusted but the TX frequency is locked (fixed). If needed you can adjust the RX frequency with the VFO knob on the IC-705.

Finally this is a short video when using the tiny GPD MicroPC with PstRotator and IC-705 as a portable computer controlled doppler adjustment.

Kategorier
Medlemsnyheter

Gott nytt år 2021!

Hej!

Tänkte ta tillfället att önska alla medlemmar i AMSAT-SM ett riktigt gott nytt år.

Från styrgruppens sida känns det lite speciellt att vi nu arbetar vidare med AMSAT-SM i en form där vi har minskat det administrativa och koncentrerar oss i stället på kärnverksamheten. (Vi håller ständigt dörren öppen för fler aktiva som vill deltaga i styrgruppen för AMSAT-SM:s framtid)

Det har varit lite annorlunda i år vad det gäller att kunna träffas och diskutera våran hobby men vi ser framåt och önskar att det återigen skall bli möjligt med lite informationsträffar inte bara via nätet.

Vi befinner oss i AMSAT världen i ett fantastiskt skede där vi nu kan kommunicera via en transponder i det geostationära bältet samt även får se ett otroligt flöde med nya studentsatelliter. Vi kommer även under kommande år, återigen få satelliter på 10&15M vilket kan bli väldigt intressant nu när solfläckarna sakta börjar öka igen.

Ett stort tack till det trogna gänget på HF nätet 3740 söndagar klockan 10.00 (Nätet har varit aktivt över 30 år)

Om man tänker till lite, vad kan vi mer önska oss? Det har från AMSAT världen föreslagits en Måntransponder i samband med ett kommande ESA projekt… Tänk om det skulle bli en verklighet… vilka möjligheter för oss som gillar rymdkommunikation.

mvh Håkan SM7WSJ (medlem Amsat-SM styrgrupp)