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AO73/FUNcube-1 spin period and illumination

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The attitude of AO73/FUNcube-1 is passively stabilised using the traditional magnet and two hysteresis rods. Since the launch over four years ago we have been intrigued with the resultant actual spin rate/period which seems to vary over time for reasons that have not yet been properly explained.!cid_part2_D32CA4A6_34E80464@bigpond_net

This graphic, which has been developed from telemetry received and maintained by Colin, VK3IH, and his team, shows the variations in some detail. Explanations would be gratefully received.

As it is expected that illumination levels may be having an influence, the next few months and years will prove interesting. The spacecraft will be entering periods of continuous sunlight. Initially this will be for a six-week period but then for periods of up to nine months!Screenshot 2017-11-25 16.58.03

This illustration from Mike, DK3WN’s, illum.exe software shows the predicted duration of the first period.

 

 

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FUNcube-1 celebrates its 4th birthday

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Today, November 21st 2017, marks the fourth birthday for FUNcube-1 in orbit.

FUNcube-1 was launched at 07:10 UTC on November 21st 2013 and its first signals were received immediately after deployment over the Indian Ocean by amateurs in South Africa. Since then it has been operating continuously in either its education mode or, with the transponder active, in amateur mode when in eclipse and at weekends.

The spacecraft has spent the four years in space orbiting the earth at between 640 and 580 km and has now travelled around the earth more than 20,000 times. That represents a distance travelled of approaching 500 million miles.

Up to now, each of the orbits has been spilt approximately 65% in sunlight and 35% in eclipse. This has resulted in the temperatures inside the small spacecraft varying by about 25o C during each orbit.

fc1 tempriseDuring the recent AMSAT Colloquium, Wouter, PA3WEG, during his presentation about the FUNcube project mentioned that the power available from the solar panels has been slowly increasing since launch. This observation led the team to do some further investigations as to the cause.

Although the launch was into a nominally Sun Synchronous orbit, over time this has drifted and the spacecraft is now entering a period when it will be in the sun for longer periods during each orbit.

The exact details are still being determined, but it seems likely that, starting from January 2018, there will be periods when the spacecraft will be in the sun for all, or almost all, of its orbits. Of course, this means that the on-board temperatures will be much higher than we have previously experienced in flight, although we have some test records from pre-flight thermal air testing that were undertaken after integration.

The key will be to discover what the equilibrium temperature will be internally. For comparison, AO85 has already “enjoyed” periods of full sun and its internal temperatures have reached up to around 55o C.

So the next few months will be quite an exciting time for the team! We remain extremely grateful to everyone is using the spacecraft for both its educational and amateur missions. Of course we are also very very grateful to those who are downloading the telemetry and uploading the data to the Data Warehouse. It continues to provide a unique record of “life on board” a 1U CubeSat in space.

Jordan’s first satellite – JY1-SAT

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During the final satellite integration training for Jordan’s first satellite, JY1-SAT, the team was supported for the final stages of integration by His Royal Highness Crown Prince Al Hussein bin Abdullah II. The spacecraft has been given to students of the Masar Initiative at the Jordan University of Science and Technology as part of the JY1-SAT mission support and training program under the Crown Prince Foundation given by ISIS – Innovative Solutions In Space and AMSAT UK and AMSAT Netherlands,.

The JY1-SAT mission was proposed by Jordanian students who participated in the first batch of the cooperation program with NASA, after which the interns had suggested the design and launch of the first Jordanian satellite CubeSat.

To build up the capability to design and develop such a first mission, the Crown Prince Foundation signed a support agreement with ISIS – Innovative Solutions In Space and the AMSAT Radio Amateur Societies of the UK and the Netherlands, for hardware and training support, building on ISIS’ and AMSAT’s experience with FUNcube radio amateur transponder missions.

As a special development for the JY1-SAT mission, AMSAT has expanded the capabilities of the FUNcube transponder to be able to transmit stored images reflecting the Jordanian culture and its historical heritage, along with a voice message recorded by the Crown Prince to be transmitted in space to receivers around the world.

The launch of the JY1-SAT, scheduled during the first half of next year, is in memory of His Majesty the late King Hussein, the first founder of the HAM Radio in Jordan and holder of call sign JY1.

JY1-SAT will have a linear, inverting, transponder downlinking between 145.855 & 145.875 MHz with the uplink between 435.100 & 435.120 MHz. The telemetry downlink will be on 145.840MHz and be FUNcube compatible. A new Dashboard will be made available before the launch of JY1-SAT

Nayif-1 and Dashboard news

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Nayif-1

Nayif-1 has now been in orbit for more than two weeks and all systems continue to operate nominally. The power budget is positive, the spin/tumble rate is acceptably low, on board temperatures are perfectly ok and, importantly, the educational/amateur transponder switching is taking place autonomously as  planned.

This image, by ISRO, shows the moment of deployment of Nayif-1.nayif-space-4

Nayif-1 has also been granted an “OSCAR” number and now has the secondary title of “EO88 – Emirates Oscar 88”.

More than 250 stations around the world have provided telemetry to the Nayif Data Warehouse and we are extremely grateful to them for their invaluable support.

The experts have now formally allocated Catalog Number 42017 to Nayif-1 (EO88) and the TLEs can now be downloaded from all the usual sources. For instance, go to  Celestrak – TLEs

New Dashboards

We have now updated the Dashboards for both Nayif-1 and FUNcube-1 so that they display only the telemetry received from the individual spacecraft that they are designed for. This will help users to display only the correct information and graphs and reduce confusion. Whilst they only display the data from ONE spacecraft, they will, as now, receive and decode the data from all FUNcube payloads currently in orbit and automatically submit it to the relevant Data Warehouse.

The new Dashboard for FUNcube-1 (ver 1044) can be downloaded from here: FUNcube-1 Dashboard Installer 1044

The new Dashboard for Nayif-1 (ver 1040) can be downloaded from here: Nayif-1 Dashboard Installer 1040

Additionally some command line parameters have been added to enable the programmes to auto-start with the desired parameters.  These are:

/minimized
/autostart
/source=dongle
or
/source=soundcard

Some notes on how to impliment these parameters can be found here: funcube-dashboard-autostart

Nayif-1 UPDATE -Thursday 16th Feb 2017

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img_20170216_111016

All the tlm numbers “in the green”! With the  Nayif-1 patch and lapel badge

Nayif-1 was successfully launched at 03:58UTC on February 15th 2017 and good signals were soon heard by stations in North America. We are pleased to be able to confirm that the first telemetry was submitted to the warehouse by Christy Hunter, KB6LTY, who will be receiving a specially produced Nayif-1 lapel badge and woven mission patch. Many thanks to everyone who was listening and sending reports, recordings or submitting data.

The satellite looks to be in perfect health and it was placed in autonomous mode before the end of the first day in orbit. Just like FUNcube-1, this mode has the spacecraft sending high power telemetry when in sunlight and with the transponder active when in eclipse. Already many contacts have been made through the transponder. As expected, the frequency stability of this spacecraft is much better than its predecessors.

The launch provider has published a video of the deployment of the 104 satellites. https://youtu.be/3KqTr1oNYwk  The image here shows Nayif-1 just after deployment from the launch vehicle.nayif-space-4

A new post-launch set of TLE’s has been issued by the launch authority and it can be downloaded from here

Please note that these numbers are not based on JSpOC observations so we do not yet have a valid catalog number.

During the Launch and Early Operation phase (LEOP) of the mission, the Nayif-1 command team have been headquartered at the American University of Sharjah Ground station in the United Arab Emirates. They have been very grateful for all the telemetry received from around the world. It has proven to be immensely useful to the team in checking that the spacecraft is functioning correctly.

Our world-wide network has greatly impressed the many professionals that have been watching our activities. Already more than 100 ground stations are submitting data to the Nayif Data Warehouse. Please continue uploading the data as this will further enhance our knowledge about the spacecraft and the space environment through which it is travelling at 7.6 km/s.

The Data Warehouse has been updated and can be seen here: http://data.amsat-uk.org/nayif1/index It now includes the Whole Orbit and High Res graphs and the upload ranking. It also includes telemetry details from the ADCS sub-system – this is called the iMTQ and is capable of actively magnetorquing. Over the coming days, we will be further tweaking the warehouse, so bear with us if it is unavailable for short periods of time.

A slightly updated Nayif-1 Dashboard is now available – this corrects one graphing error for negative values. It can be downloaded from here:http://download.funcube.org.uk/nayif-1_Dashboard_1039_Installer.msi

Guidance notes for setting this up are here : Guidance Notes

A reminder that if you are already a registered user of the FUNcube Dashboard then you do not need to re-register. Your existing details will transfer automatically to the new Dashboard when you run it for the first time.

Nayif-1 Pre-launch Keps and other details UPDATED Tuesday 14th Feb 2017

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The launch time for the Nayif-1 CubeSat remains as 03:58UTC on February 15th 2017 on the PSLV C37 vehicle. We expect the launch to be webstreamed at http://webcast.gov.in/live/

A set of pre-launch TLEs have been released:

NAYIF

1 17002U 17002A   17046.17824931 0.00000000  00000-0  00000-0 0  9993

2 17002  97.5521 107.5843 0004848 278.6481 296.8511 15.21991390    01

This file can also been downloaded from here http://download.funcube.org.uk/nayif_tle.txt

We now expect that the FUNcube transmitter on Nayif-1 will activate at approximately 04:47 UTC Feb 15th. (NB – This is a revised AOS and it is still Tuesday evening in America!) Initial transmissions will be in “safe” mode and will be of the 1k2 BPSK telemetry only with approx 50mW of RF power on 145.940MHz.

 untitledAt this time the spacecraft will still be over the Southern Pacific Ocean but AOS in Mexico is expected at around 04:54 UTC and the first pass will then track northwards in range of stations situated in the  western US and Canada.

During the Launch and Early Operation phase (LEOP) of the mission, t he Nayif-1 command team will be headquartered at the American University of Sharjah Ground station in the United Arab Emirates. They will obviously be especially keen to have all possible reports of signal reception during this first orbit! To encourage everyone to take part, there will be a small prize for the stations that submit the first data to the Nayif-1 Data Warehouse. Please help the team if you can.

Details of the Nayif-1 frequencies, together with details of how to the download the Dashboard can be found here

https://funcube.org.uk/2017/02/08/nayif-1-launch-date-now-confirmed/

The Data Warehouse is still under final development but can be viewed here: http://data.amsat-uk.org/nayif1/index

Please note that if you are already a registered user of the FUNcube Dashboard then you do not need to re-register. Your existing details will transfer automatically to the new Dashboard when you run it for the first time.

If you run the test file with the Nayif-1 Dashboard please do not expect the Warehouse to show the data – it is from an earlier date than that is already displayed. However the “packets uploaded” tab at the bottom right corner of your Dashboard will show that the files have uploaded OK, that all is well with your system and that it is ready for action.

The AMSAT-UK and -NL team will also be using the #funcube IRC channel on launch day and you will be very welcome to join them there. If you do not have the Dashboard available then also please submit your heard reports via IRC as well. A web client can be found at http://irc.lc/freenode/funcube if you do not have an IRC client installed.

Nayif-1 launch date now confirmed

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nayif-1 patch2Nayif-1, a 1U CubeSat, which has a full FUNcube payload, is scheduled for launch on an Indian PSLV launch vehicle at 03:58 UTC on February 15th 2017. The flight, C-37, will be carrying a total of 104 satellites into orbit.

Nayif-1 has been developed by the Mohammed bin Rashid Space Centre (MBRSC) and American University of Sharjah (AUS). The UAE’s first Nanosatellite was developed by Emirati engineering students from AUS under the supervision of a team of engineers and specialists from MBRSC within the framework of a partnership between the two entities, aiming to provide hands-on experience to engineering students on satellite manufacturing.

The spacecraft includes a U/V linear transponder and telemetry transmitter. It employs enhanced oscillator circuitry and includes an active attitude determination and control system.nayif-1fm

As with previous missions carrying FUNcube payloads, AMSAT-UK would very much like to receive as many reports from stations around the world, especially during the first few minutes and hours after launch.

There is  a mission specific Telemetry Dashboard for this project and this can be downloaded from http://download.funcube.org.uk/Nayif-1_Dashboard_1038_installer.msi and, in a similar way to the FUNcube-1 Dashboard, this will be capable of uploading the telemetry received to a central Data Warehouse.

Guidance Notes for the installation of the Dashboard, integration with a FUNcube Dongle and the Data Warehouse have been prepared for the Nayif-1 mission. These can be downloaded here Nayif-1 Dashboard Notes

A file to test that the Dashboard and Warehouse configuration are working correctly can be downloaded from  http://download.funcube.org.uk/nayif1_testfile.funcubebin

The operating frequencies for the spacecraft will be:

Telemetry
145.940MHz using 1k2 BPSK to the FUNcube standard.

Transponder
Uplink on 435.045 – 435.015MHz
Downlink on 145.960-145.990MHz

Initial operations of the spacecraft will be in a low power “safe” mode where only the telemetry transmitter is activated.

More details about the launch, exact deployment time and pre-launch TLE’s will be made available as soon as they become available, in the meantime we greatly appreciate your support.