Fred Jansen

@redplanet00

PhD - astrophysics. Was XMM-Newton project scientist (PS) and mission manager (MM), Gaia PS for 1 year, MEX , VEX, Rosetta, XMM MM (10,7,2,11 yr). Now Gaia MM

Leiderdorp, The Netherlands
Vrijeme pridruživanja: siječanj 2011.

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  1. 2. velj

    I have noted that when attempting trucolour images, towards the edge of the scan things tend to get too blue - I guess due to atmospheric scattering in an increased column through the atmosphere. Built a correction into my s/w - believe it works - left = orig

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  2. 2. velj

    Yesterday PM FY3B @ 14:52 - 89.7 deg Elevation pass (which explains the small gap) - but the SPID MD-02 controller survived. Earlier in the day, due to a s/w bug I mistakenly introduced, I clearly showed that overlapping commands lead to the 'M2 pulse timeout' !

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  3. 31. sij

    I hardly ever track NOAA satellites anymore (don't know why) this is NOAA-18 this AM at 09:46

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  4. 31. sij

    Just now at 15:07 FY3B - while doing some tests of my tracking s/w beam size and removing overlapping commands - works nicely :-)

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    30. sij

    Boston Dynamics' Atlas shows off its agility with a flawless gymnastic routine. Credit: Boston Dynamics

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  6. 29. sij

    These are great places to visit - I can recommend it :-)

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  7. 28. sij

    Ooops, by the way MetopB @ 20:18

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  8. 28. sij

    Just did a test of my updated tracking s/w during a high-el (87.8 deg) pass with look-ahead and flip, but also using an option to remove commands overlapping in time (appears to be a SPID MD-02 issue) - went quite well :-)

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  9. 27. sij

    I am quite sure I recognise a team member in this picture

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  10. 26. sij

    And now .... for something completely different - from the black sea to the southern tip of Greenland : a merge of FY3B @ 03:12 @ 04:52 and @ 06:34 - alas the East pass was only 27 deg elevation = just intercepted by roof of neighbours :-)

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  11. 25. sij

    Enjoying a drink in the historic center of Leiden – mjesto: Het Koetshuis De Burcht

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    24. sij

    We successfully completed today's test countdown at Cape Canaveral. Systems now will be safed, cryogenic fuels drained and the rocket allowed to warm up before rollback to the Vertical Integration Facility for attachment.

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  13. 24. sij

    This mornings harvest : FY3B @ 05:23 FY3C@08:24 MetopC @ 09:28 FY3C @ 10:04

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  14. 24. sij

    Overnight automated :-) pass of FY3B @ 03:45

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    22. sij

    BepiColombo is now 36 million km away from Earth, 3 million km closer than a week ago. The spectrogram shows the X-band downlink signal while BC locks to the uplink from Estrack Malargue groundstation. Good downlink Doppler compensation before lock, uplink Doppler while locked.

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    21. sij

    Natural color image of Comet 67P/Churyumov-Gerasimenko taken from an altitude of 9.3 km by the Rosetta spacecraft on July 20, 2016.

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  17. 17. sij

    Acrop of the Alps from the 09:17 MetopB - still not much snow at lower altitudes and the valley floor

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  18. 17. sij

    A low west, heavily obstructed pass @ 10:58 - MetopB - nice depression over the ocean

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  19. 17. sij
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  20. 17. sij

    This AM at 08:29 FY3C - over 4000 lines - not bad for my location

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