Tuesday, 16 July 2013, 11:15 UTC (6:15 am CT)
Francesco De Paolis
Maurice André Vigneault
ARISS I Agenda:
Roll Call — Rosalie White, K1STO
1. Operations/Hardware Status Update—Frank Bauer, KA3HDO
Our recent ARISS contacts using the Ericsson radio have been successful. We have learned more about contacts using the radio, such as, how its output is affected by the location of the ISS.
The Kenwood D-700 in the Russian segment has had some changes made to it by Sergey and school radio contacts with it have been successful.
The D-710 has been operational, transmitting SSTV downlinks that hams worldwide have enjoyed.
2. Update on Kaiser-Italia (KI) proposal prepared for ESA – Gaston Bertels, ON4WF
Gaston reported that every two weeks a technical telecon continues to be held with the ARISS technical team and KI engineer Elisa Carruba, on the proposal for a CW Beacon for Columbus.
At yesterday’s telecon, the group came to consensus on the general content of the proposal
- The unit will provide 3 watts of RF output on 2400.15 MHz
- Signal modulation will be A1A (carrier modulation) and F3E (FM)
- The CW beacon will transmit an ID as well as some telemetry (temperature, power supply voltage)
- The unit will provide a DATV signal that can be used for modulating the HamVideo transmitter; video content will be provided on a stick and the content could be uploaded or generated onboard
- The unit will provide different voltages to feed other ARISS equipment.
- The unit will accept several audio inputs, allowing modulation with
- audio provided by an external transceiver (UHF or L-band), in order to be operated in transceiver mode
- AMSAT-NA will provide a duplexer for the "CW Beacon" unit, needed for transceiver mode usage
Lou said that a prototype of a duplexer has been developed and is being tested. These could be produced for KI to incorporate into their box. The CW beacon system plans include capabilities for 2 different voltage outputs to support a future D-710 and for the Kenwood VC-H1.
The full KI proposal will go to Mark Steiner who will send it to the PS&U for review. If the PS&U recommends the proposal, the delegates will review it next.
Gaston reiterated that ESA will pay for all costs if the proposal is accepted.
3. Update for Ham TV Launch on HTV4, Commissioning at end of 2013, Tests of the Streaming Program —Gaston Bertels, ON4WF
Work continues steadily during the weekly telecons. We have confirmation that ham video will fly on the HTV-4 launch slated for August 4. Once the equipment is moved out of HTV-4 and into the Columbus module, time would be scheduled to install the equipment. Astronaut Michael Hopkins has been trained to do the installation. That would be followed by commissioning.
ESA will proceed to pre-flight tests in collaboration with ARISS team, as follows:
August 28th and 29th have been scheduled for ESA services and ARISS teams to begin the Experiment Sequence Test (EST) in Italy. IK1SLD in northern Italy will be the ground station and is being equipped for Ham TV right now. An end-to-end test of the whole system will be done on the ground. IK1SLD will receive DATV signals similar to the HamVideo signal from the ISS. The signal will be generated by a low power transmitter located nearby. Doppler can be simulated. The signal will be decoded with the software developed by Jean Pierre Courjaud, F6DZP, and webstreamed to the BATC server. B.USOC (ESA) will connect to the BATC server and evaluate the received signals. The test will cover the different HamVideo configurations (frequencies and symbols rates).
On September 4 and 5, assimilation tests will be done to review how to use the equipment, and this will be done by ESA services and ARISS teams.
Gil Carman is determining the best weeks for passes over Matera, Italy, for onboard commissioning, and thus far choices are end of October, end of December, and in February. These dates are all subject to the availability of the astronaut, ESA services, ARISS teams, and the Matera ground station with the big dish antenna. The VLBI ground station of the Italian Space Agency (ASI), located in Matera, will be used for the onboard commissioning of the HamVideo equipment.
Telecon attendees asked about end-to-end testing, to learn what discussions had taken place about the Doppler on the signal coming from the ISS and correcting for it relative to the TV image so there is no issue in the ability to receive TV images. Lou said this was discussed early on by the ARISS teams and the Italians, but Lou is unsure if more Doppler tests are planned. Oliver confirmed that discussions about this had taken place, and the Italians did tests, as did KI, but more discussion and tests will be done. Gaston agreed that the simulated signals generated by KI for IK1SLD will include Doppler.
4. Update on Russian school/youth contacts—Sergey Samburov, RV3DR
Sergey was not able to attend our telecon today and we hope he can attend our next meeting. He has reported during this month’s technical team telecons that Russia has been doing more educational contacts.
5. Draft Response to ITU Member States; update—Gaston Bertels, ON4WF
Emanuele D'Andria has prepared the document of notification for ARISS’s use of frequencies on the ISS. The response dealt only with VHF, UHF, and S-Band, and did not include mention of L-Band. The document has been submitted to the Italian radio administration, which will submit it to the ITU.
6. Update on ARISS web site—Frank Bauer, KA3HDO
The ARRL is continuing to work on an updated web site. Other ARISS regions are ready to support this work with additional content. Some areas of the ARRL draft website are still under construction. Requests for input from ARISS regions will be made soon. ARRL hopes to have a draft to view in about a month.
7. Update on Delegates’ responses in regard to travel for 2013—Frank Bauer, KA3HDO
Responses from delegates have been varied, with some delegates desiring meetings fairly quickly and others feeling less of the need for a meeting. Frank proposed that we start to plan our next meeting for the end of April 2014 at ESA-ESTEC, and to focus on educational aspects.
********DELEGATES’ ACTION ITEM*******: Frank asked delegates to comment by August 15 on his suggestion (end of April 2014 at ESTEC), or to propose other locations and dates. We hope to decide on a date and location during the August telecon.
8. Update on ARISS Project Selection & Use Committee—Mark Steiner, K3MS
Mark will distribute to the PS&U Committee members the requirements that ARISS developed in past years for submitting a proposal to ARISS. The committee will review the requirements in preparation for studying the proposal for the S-Band beacon.
9. New Business
1. New Business
Our next meeting will be 20 August 2013.