[Isocops] .STF file

Nathan Schwadron nschwadron at me.com
Mon Jun 21 13:46:39 EDT 2010


Hi Mark

Could you include the attached background test into a new version of the stf?

Nathan

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On Jun 21, 2010, at 12:26 PM, Mark Tapley wrote:

> All,
> 	looked over the .STF file produced this morning. If the 
> repointing maneuver is done according to the predictive .oef file:
> 
> IBEX_2010_Forecast_18June10-30Sept10_v001.oef
> 
> it'll look about like:
> 
> 2010-07-05T06:26:28.067Z,RepointingTargetVector,vtsX:-0.2251425321231968,orbit:84,vtsZ:0.387883331407774,vtsY:0.8937882083833745
> 
> 
> So off I go to ibex_rotate
> 
> 
> [tapley at ena ~]$ ibex_rotate -o -u 
> -0.22514253212319688,0.8937882083833745,0.387883331407774 ibex-sun -t 
> 2010-07-05T06:26:28.067Z
> Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
>  points axis  +1.000000,+0.000000,+0.000000
>  towards ECI  -0.225143,+0.893788,+0.387883
>  which is     R.A. +104.138 Decl. +22.823
>  missing      R.A. +104.145 Decl. +22.822 
> (-0.22514253212319688,0.8937882083833745,0.387883331407774)
>  error is     R.A.   +0.006 Decl.  +0.001
>  for a total  0.006 deg
> [tapley at ena ~]$ ibex_rotate -o -u 
> -0.22514253212319688,0.8937882083833745,0.387883331407774 ibex-sun -t 
> 2010-07-11T15:36:30.000Z
> Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
>  points axis  +1.000000,+0.000000,+0.000000
>  towards ECI  -0.225143,+0.893788,+0.387883
>  which is     R.A. +104.138 Decl. +22.823
>  missing      R.A. +110.700 Decl. +22.060 
> (-0.22514253212319688,0.8937882083833745,0.387883331407774)
>  error is     R.A.   +6.561 Decl.  +0.763
>  for a total  6.112 deg
> 
> 
> Looks like the PL will be safe from the time of the maneuver until 
> the descending time (good), if the actual repointing is done before 
> the ASC macros run during the preceding perigee pass.
> 
> There's no star tracker outage during science operations.
> 
> It looks good to me.
> -- 
> 						- Mark     210-379-4635
> -----------------------------------------------------------------------
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