AO-92 to Try Imaging Hurricane Florence September 13-14

Discussion in 'Satellite and Space Communications' started by N8HM, Sep 12, 2018.

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  1. N8HM

    N8HM Premium Subscriber QRZ Page

    AMSAT Vice-President of Operations, Drew Glasbrenner, KO4MA says that the camera on AO-92 is planned to be used to try to image Hurricane Florence during North American east coast passes on Thursday, September 13, and Friday, September 14.

    AO-92 will not be in its U/V FM voice transponder operation during these passes. Ground stations should standby and not attempt to access AO-92 during this time. Voice operation will be available later during these days.

    The high speed image data will be transmitted on the 145.880 MHz downlink.

    The image can be captured, decoded, and uploaded to the Fox-1 data warehouse using the FoxTelem v.1.06 software available from AMSAT:
    http://amsat.us/FoxTelem/windows
    http://amsat.us/FoxTelem/mac
    http://amsat.us/FoxTelem/linux

    [ANS thanks AMSAT Vice-President of Operations, Drew Glasbrenner, KO4MA for the above information]

    [​IMG]
     
    WE4B, W5PFG, K3RLD and 1 other person like this.
  2. W6KJL

    W6KJL Ham Member QRZ Page

    Hi,

    Thank you for posting this information. I hope you don't mind a stupid question from a new guy. In cases like this, is the image data only transmitted live on the downlink during the pass, or is it stored and transmitted for a period during the subsequent orbit? I ask because I'm in California and wanted to know if I would hear the image data transmission later during a pass here.

    73,

    John - W6KJL
     
  3. WD9EWK

    WD9EWK Ham Member QRZ Page

    Images are not stored on the satellite. The images are captured by the camera, then transmitted on the 145.880 MHz downlink during the pass.

    Unfortunately, for us out west, the best way for us to see any images will be on AMSAT's web site at:

    http://www.amsat.org/tlm/fox1d/images/

    based on the data received by ground stations during the pass uploaded to AMSAT.

    73!
     
    AI6DO and W5PFG like this.
  4. W6KJL

    W6KJL Ham Member QRZ Page

    Thanks Patrick.
     
    WD9EWK likes this.
  5. KG2C

    KG2C XML Subscriber QRZ Page

    The pass today started in FM mode, then the control stations asked people not to transmit and seconds later someone of course tried to make contacts. The sat was soon switched to the High Speed data mode. I got only small fragments of the images and just 27 frames.
    upload_2018-9-14_11-31-17.png
    upload_2018-9-14_11-31-30.png
    upload_2018-9-14_11-31-46.png
    The captured time is wrong since I was recording the transmission on my laptop from the park and then uploaded and decoded on my desktop computer.
     
    Last edited: Sep 14, 2018
    K3RLD likes this.
  6. K3RLD

    K3RLD Ham Member QRZ Page

    Yeah, yesterday it was a flawless switchover. Today somebody wasn't paying attention. Even tried contacts on top of the command signals.
     
    W5PFG likes this.
  7. WE4B

    WE4B Ham Member QRZ Page

    :(
     
    W5PFG likes this.
  8. K3RLD

    K3RLD Ham Member QRZ Page

    Sounded like a new sat op - (at least a callsign that wasn't familiar to me). If that's any consolation.....
     
    WE4B likes this.
  9. WE4B

    WE4B Ham Member QRZ Page

    That takes some of the sting away :)
     
    WB1FJ and K3RLD like this.
  10. K9JKM

    K9JKM Ham Member QRZ Page

    Nice captures ... not to worry if you only get partial images. Even partial images are used.
    See below for details from this week's ANS-259 bulletins

    Tips Regarding Image Capture From AO-92

    Jerry Buxton, NØJY, AMSAT Vice-President Engineering, provided some
    insight about of how the AO-92 camera image capture is transmitted
    via its high speed telemetry data downlink to how the images are
    produced on the Fox telemetry web pages.

    Visit this page to view the images that have been captured:
    http://www.amsat.org/tlm/leaderboard.php?id=0&db=FOXDB

    Some stations may have captured partial images that they can see on
    their local FoxTelem display, the web page image is produced from the
    data received by the server from the many stations who may be
    capturing the pass with FoxTelem. That literally means the more the
    merrier, and even if you only see as little as one scan line on your
    FoxTelem image that line will be sent to the server to be "stitched
    together" with all other image data that others capture.

    Your line may be the only capture of that line and just what is
    needed to complete the whole image. While the single line or
    incomplete image on your display may seem insignificant or be
    disappointing, you are contributing to the opportunity to have the
    entire image available on the web. That is significant, and counting
    on several stations to receive the components of a full image is part
    of the design of FoxTelem.

    To participate in capturing the full image you must have the Decoder
    Options "Upload to Server" checked in your FoxTelem settings. That
    setting plus the participation of many stations, no matter how much or
    how little data they might individually receive, is what can make full
    images available for all to see on the website.

    Thank you for participating in the science the Fox-1 satellites
    deliver, and enjoy the birds!

    [ANS thanks Jerry Buxton, NØJY, AMSAT Vice-President Engineering for
    the above information]
     
    WD9EWK likes this.

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