RE: Nanosail-D flash pattern, and images of yesterday

From: Derek C Breit (breit_ideas@poyntsource.com)
Date: Mon Aug 15 2011 - 16:26:29 UTC

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    Very Nice..
    
    Derek
    
    -----Original Message-----
    From: seesat-l-bounces+breit_ideas=poyntsource.com@satobs.org
    [mailto:seesat-l-bounces+breit_ideas=poyntsource.com@satobs.org] On Behalf
    Of Marco Langbroek
    Sent: Monday, August 15, 2011 8:20 AM
    To: satelliet lijst (SeeSat)
    Cc: Bram Dorreman; Ralf Vandebergh
    Subject: Nanosail-D flash pattern, and images of yesterday
    
    Hi all,
    
    For those interested:
    
    Widefield images of yesterday evening's fine Nanosail-D (10-062L) pass and a
    
    brightness variation curve derived from one of these images, have been
    posted here:
    
    http://sattrackcam.blogspot.com/2011/08/nanosail-d-flashing-rapidly-and.html
    
    Flash timings from the image in question:
    
    image s14082011_9
    14 Aug 2011, 20:51:17.30 - 20:51:27.35 UTC
    
    flash times (UTC):
    20:51:17.39
    20:51:17.89
    20:51:18.15
    20:51:18.42
    20:51:18.90
    20:51:19.17
    20:51:19.63
    20:51:20.40
    20:51:20.83
    20:51:21.14
    20:51:21.40
    20:51:21.88
    20:51:22.13
    20:51:22.62
    20:51:22.86
    20:51:23.32
    20:51:23.79
    20:51:24.06
    20:51:24.35
    20:51:24.81
    20:51:25.49
    20:51:25.72
    20:51:26.22
    20:51:26.63
    20:51:26.91
    20:51:27.17
    
    The other images were too saturated (trail too bright).
    
    Flash interval is wildly variable, between 0.23-0.77 seconds, with an
    average 
    0.39 +- 0.14 seconds.
    
    The curve from this image is quite nice, with sharp peaks.
    
    - Marco
    
    
    -----
    Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
    e-mail: sattrackcam@wanadoo.nl
    
    Cospar 4353 (Leiden):   52.15412 N, 4.49081 E (WGS84), +0 m ASL
    Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL
    SatTrackCam: http://home.wanadoo.nl/marco.langbroek/satcam.html
    Station (b)log: http://sattrackcam.blogspot.com
    -----
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