Re: NROL-25 to launch FIA Radar 2

From: Bob Christy (bob@zarya.info)
Date: Tue Mar 27 2012 - 21:34:16 UTC

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    Again thanks to Ted - I have the de-orbit information for the FIA Radar 
    1 launch and have added it to the map, scroll down the page:
    http://www.zarya.info/Gallimaufry/FIARadar.php
    
    Bob Christy
    
    On 27/03/2012 21:30, Bob Christy wrote:
    > Ted was kind enough to pass details of a danger area that has been
    > flagged for the Delta upper stage re-entry over the Indian Ocean. I've
    > added a map to my FIA Radar 2 NOTAM page:
    > http://www.zarya.info/Gallimaufry/FIARadar.php
    >
    > Bob Christy
    >
    >
    > On 26/03/2012 22:53, Bob Christy wrote:
    >> I have created a map showing how the NOTAM zones for the FIA Radar 1
    >> launch 2010 September, and the upcoming NRO L-25 mission line up:
    >> http://www.zarya.info/Gallimaufry/FIARadar.php
    >>
    >> Bob Christy
    >>
    >>
    >> On 26/03/2012 21:09, Bob Christy wrote:
    >>> A NOTAM has been published for the impact zones of launcher components.
    >>> Being a different vehicle from the first FIA Radar satellite, they lie
    >>> at different distances from Vandenberg. The new ones (Delta 4) line up
    >>> very well along the same track and between the ones from the earlier
    >>> Atlas launch.
    >>>
    >>> The restriction period is 22:15-23:34 UTC. It fits the 22:30 launch time
    >>> with some spare time for unexpected delays. It hints, possibly, at a
    >>> launch window of about 30 minutes duration.
    >>>
    >>> Bob Christy
    >>>
    >>>
    >>> On 25/03/2012 07:26, Ted Molczan wrote:
    >>>> NROL-25 is scheduled for launch on a Delta IV Medium+ (5,2), from Vandenberg AFB, on 2012 Mar 29 at 22:30 UTC. I am
    >>>> confident that its payload is the second FIA Radar satellite.
    >>>>
    >>>> FIA Radar 1 (10046A / 37162) was launched on NROL-41, from VAFB, aboard an Atlas V-501. If NROL-25's ascent trajectory
    >>>> is identical to that of NROL-41, then the payload's orbit at the first ascending node after separation from the second
    >>>> stage will be:
    >>>>
    >>>>                                                            1067 X 1080 km
    >>>> 1 79701U          12090.05719863  .00000000  00000-0  00000-0 0    08
    >>>> 2 79701 122.9931 201.7813 0008524  77.8521 282.3398 13.49540846    03
    >>>>
    >>>> Since the launch vehicle is different, it is reasonable to expect small differences from the above elements.
    >>>>
    >>>> Northern hemisphere observers will have evening visibility. Southern hemisphere observers will have morning visibility.
    >>>>
    >>>> Since the performance of the Delta IV Medium+ (5,2) exceeds that of the Atlas V-501, it is reasonable to expect that
    >>>> NROL-25's second stage will de-orbit soon after payload separation, the same as NROL-41's Centaur.
    >>>>
    >>>> FIA Radar 1 manoeuvred over a 21 day period to adjust its orbit to an altitude of 1103 km, with the argument of perigee
    >>>> frozen near 90 deg.
    >>>>
    >>>> FIA Radar 2's RAAN will be nearly 180 deg east of that of FIA Radar 1, and their planes will be 114 deg apart.
    >>>>
    >>>> I expect NROL-39 and NROL-45 to complete the initial FIA Radar constellation. Both are Atlas V-501 launches from VAFB.
    >>>>
    >>>> Ted Molczan
    >>>>
    >>>>
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