June 2008 - AMSAT-BB - mailman.amsat.org

OT - Weather sats
by Ed Tump 12 Jun '08

12 Jun '08

Folks, Any idea on what kind of TX power is being used for the weather satellites? Thanks. 73, Ed KC9GWK Grid EN52 AmSat Member

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OT - Weather satellite antennas
by Ed Tump 12 Jun '08

12 Jun '08

Folks, Thanks for the response on power. Now I wonder if my Arrow satellite antenna will work for these weather satellites or my AL800 HT antenna. Any ideas? Thanks. 73, Ed KC9GWK Grid EN52 AmSat Member

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ribbon cable in LVB Tracker
by Ollie Eisman 12 Jun '08

12 Jun '08

Hi, I am looking for a source for multi-color ribbon cable that is used to connect the LCD to the PCB header in the latest LVB Tracker box. Any suggestions on what to use and where to find it? 73, Ollie AJ1O

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CUTE-1.7+APDII Earth Picture analysis
by Mineo Wakita 12 Jun '08

12 Jun '08

CUTE-1.7+APDII camera Earth Picture was analyzed by the grand station as follows. First, rotate the picture by 180degrees. Can you see land in the left side of the picture? http://lss.mes.titech.ac.jp/ssp/cute1.7/blog/080601_Picture_180degRotated.j… Using the Google Earth and see Japan from the position of Cute-1.7 then trim the image by 50degrees. Coastlines are identical. http://lss.mes.titech.ac.jp/ssp/cute1.7/blog/080601_Picture_GoogleEarth_Jap… To clearly compare them, look at the picture below. In the picture, parts of coastlines are accentuated. Also, shapes of clouds looks the same. http://lss.mes.titech.ac.jp/ssp/cute1.7/blog/080601_Picture_Comparison.jpg JA1GDE/Mr.Kasei gives us the following picture which clearly shows what was in the picture. We'd like to say thank you for Mr.Kasei. http://lss.mes.titech.ac.jp/ssp/cute1.7/blog/080601_Picture_JA1GDE.jpg See more: http://www.ne.jp/asahi/hamradio/je9pel/cut17apd.htm#bottom

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Delfi-C3 report
by Stefan Wagener 12 Jun '08

12 Jun '08

My recent observations: The satellite is still experiencing abrupt termination of telemetry transmission. During ascending passes telemetry is transmitted once satellite comes out of eclipse. Initial signal sometimes rough and 500Hz-1Khz above nominal frequency. Rapid warming will bring signal frequency down to +450 Hz. Sometimes satellite telemetry starts repeatedly after 30 to 40 packets, other times it runs for 100 to 300 packets before abruptly stopping. Will wait for the Delfi-C3 team to report on their attempts on working this one out. However, the satellite is working and active. Stefan, VE4NSA

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Re: CUTE-1.7+APDII camera Earth Picture
by Mineo Wakita 12 Jun '08

12 Jun '08

The grand station says as follows: The CMOS camera like Mobile device is carried in Cute-1.7 + APD II. A picture is acquired by controlling from PDA which is OBC. Furthermore JPEG conversion is performed inside PDA. And the file size is compressed, and the downlink is carried out on the ground station using FM packet with a U-band. When a camera turned to the direction of the earth, a photograph was set up and taken so that a shutter might be cut. However, since this function worked normally, it is still under examination whether it is that the earth was reflected. Cute-1.7 + APD II took four photographs by the present and carried out the downlink of the thumbnail (64*48 pixels) about these all. The photograph of the full-size picture (640*480 pixels) which the earth is reflected finely and the downlink has completed is only what was exhibited on my website the other day.

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Cute received 0820utc (CW), no packet
by Henk, PA3GUO 12 Jun '08

12 Jun '08

June 12, 2008, 08:20 utc CW 437.275 .... ........s52623615a3817 cute 87ccaeb9382624615d4017 cute 87cbadb8382723625b4817 cute 87cbaeb3382624625f4617 cute 87cbadb5382624635a4417 cute 87cbadb1382624635f4c17 ... Report send to the CUTE team as well. No packet activity heared at 437.475. Henk, PA3GUO

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Cubesats 2008/06/12
by David 11 Jun '08

11 Jun '08

Hello All, Just listened to the latest pass at 0030-0040 UTC CUTE1.7 not heard on 437.275 CW or anything on 437.475 either. DO-64 / Delfi-c3 not heard. SEEDS - digitalker/sstv mode (so my 70cm setup is still working ok.) 73 de David VK5DG

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Re: French QRM on the uplink of AO-51
by Henk, PA3GUO 11 Jun '08

11 Jun '08

Hi Ib ! In case you can derive from the accent that it was the North part of France, your French is not that bad at all :-) (wasnt it Marocco or did you look at the footprint ?) Henk, PA3GUO > At the pass with AOS at 1837 UTC here > in Copenhagen there was a VERY strong > QRM from the North of France. > My French is too bad to understand it :-)

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Cute CW June 11, 20:40utc
by Henk, PA3GUO 11 Jun '08

11 Jun '08

June 11, 2008, 20:40 utc cute 87cbaa9538272374533b17 hi hi de jq1ytc digi off .... ...................... .. .. .. ...... .... ... .... ..cba99a3826237a633a17 hi hi de jq1ytc digi off cute 87ccae923826237b633917 hi hi de jq1ytc digi off cute 87ccad923826237d553717 hi hi de jq1ytc digi off cute 87cca9973825227c673217 hi hi de jq1ytc digi off cute 87cca9993825237c5d.... hi hi de jq1ytc digi off cute 87ccaa973825 437.275 MHZ, CW, 2x8 elements beam, no pre-amp Kenwood TS2000 Henk, PA3GUO

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