Pointing History and Livetime ROOT Tuple
for DC2

The pointing history and livetimes are available in FITS (as FT2), or as a ROOT ntuple.

The ROOT files contain one TTree named "pointing_history” with columns for each event as described in the following table:

 

Type

Description

start

Double_t

starting time of interval (Mission Elapsed Time)

stop

Double_t

ending time of interval (Mission Elapsed Time)

sc_position

Float_t

S/C position at start of interval (x,y,z inertial coordinates)

lat_geo

Float_t

ground point latitude

lat_mag

Float_t

geomagnetic lattitude

lon_geo

Float_t

ground point longitude

rad_geo

Float_t

S/C altitude

ra_zenith

Float_t

RA of zenith direction at start

dec_zenith

Float_t

Dec of zenith direction at start

B_McIlwain

Float_t

McIlwain B parameter, magnetic field

L_McIlwain

Float_t

McIlwain L parameter, distance

ra_scz

Float_t

viewing direction at start (RA of LAT +z axis)

dec_scz

Float_t

viewing direction at start (Dec of LAT +z axis)

ra_scx

Float_t

viewing direction at start (RA of LAT +x axis)

dec_scx

Float_t

viewing direction at start (Dec of LAT +x axis)

in_saa

Float_t

whether spacecraft was in SAA

livetime

Float_t

Livetime since last tick

 


 

Owned by: Heather Kelly

Last updated by: Chuck Patterson 03/07/2006