Table 2
Initial SPICE kernels used as input for SPG SHAP4S processing.
| Kernel type | Kernel name |
|
|
|
| 67P ephemeris kernel (SPK) | CORB_DV_075_01_______00130.BSP |
| aRosetta orbit/ephemeris kernel (SPK) | RORB_DV_075_01_______00130.BSP |
| aRosetta pointing kernel (CK) | RATT_DV_075_01_01____00130.BSP |
| Rosetta frame kernel (FK) | ROS_V24.TF |
| Rosetta spacecraft clock kernel (SCLK) | ROS_150126_STEP.TSC |
| bRosetta instrument kernel (IK) | No IK kernel available for the OSIRIS NAC |
| cPlanetary constants kernel (PCK) | No formal PCK kernel for 67P available |
Notes.
These are initial data. For final kernels (improved within SPG), see Table 3.
OSIRIS NAC focal length and distortion information for each image pixel were taken from distortion images that have been derived from pre-launch laboratory and in-flight star field measurements (Keller et al. 2007; Tubiana et al. 2015).
Initial values for the pole orientation (RA = 69.28°, Dec = 64.10°) were retrieved from earlier SPG analysis using SHAP4 image data only. The rotational period (W1 = 696.53265399902°/d, i.e., 12.4043 h/rotation) was taken from results of analyses of light curves from OSIRIS images of the Rosetta early approach phase (Mottola et al. 2014).
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