Survey history data

Pre-Programmed Pointing Lists

The Pre-Programmed Pointing Lists (PPL) are made by Planck Science Office from the Baseline Scanning Strategy with the help of the Software Planning and Performance Tool. They are sent to MOC/FD for use in making the Augmented Pre-Programmed Pointing Lists (APPL) used for commanding the spacecraft attitude.

The PPL file name is the following: YYYYMMDD_yyyymmdd_NNNN_X.PPL

with YYYYMMDD = start date of the valid span of the PPL file

yyyymmdd = end date of the valid span of the PPL file

NNNN = unique sequence number, in the range 0000 ≤ NNNN ≤ 9999, incrementing sequentially throughout the mission and uniquely identifying each new PPL file that is generated (i.e. no repeated numbers and no gaps in the sequence of PPLs) o 0000-8999 reserved for PSO o 9000-9999 reserved for attitude manoeuvres generated by MOC

X = type of PPL, as follows: o R = Routine (standard 4-week PPL) o C = Contingency (3-day replanning) o L = Long-Term PPL (LTPPL) o S = Special

PPLs contain the following information in ASCII columns:

• pointing reference number

• Ecliptic longitude

• Ecliptic latitude

• nominal start time for pointing

• earliest allowed start time

• latest allowed start time

• nominal dwell time

• observation type

• comments

PPLs can be found in the Planck Legacy Archive in the "Time-Ordered Information: Operational Files" section, ordered normally by periods of a month. A full list of the available files can be found here.

Detailed information about the PPL's can be found here: PPL ICD

Augmented Pre-Programmed Pointing Lists

APPLs are made by MOC / Flight Dynamics using pointing information (PPLs) from the Planck Science Office.

The APPLs incorporate information about the Operational Days boundaries in order to fit pointings into each OD.

APPLs are grouped and summarized by MOC to form files called the APPL Summary Files or APS.

These are delivered in the Planck Legacy Archive in the "Time-Ordered Information: Operational Files" section, by Operational Day. A full list of the available files can be found here.

Detailed information about the APPL's can be found here: APPL Interface Control Document

Attitude History Files

The pointing history of Planck is described in the Attitude History Files (AHF) sequence. All the AHF can be found in the Planck Legacy Archive, for three different methods of computation ( AHF, DHF, GHF).

The GHF are made using refined pointing information from the Fiber Optics Gyroscope.

Available information concerning the AHF can be found here: AHF Interface Control Document

Focal plane geometry

The Spacecraft-Instrument Alignment Matrix (SIAM) contains all the geometry information for each detector of both instruments with respect to the main optical frame.

The last updated SIAM is provided in the Planck Legacy Archive in the "Time-Ordered Information: Operational Files" section and can also be downloaded here

Information about the structure of the SIAM can be found here: SIAM ICD

Orbit file

The orbit file is produced by the Flight Dynamics team at ESOC and contains the information of the Planck orbital history throughout the whole mission (since launch).

This product is available in the Planck Legacy Archive interface in the "Time-ordered information : Orbit file" section. Only one orbit file is delivered since it contains all the past information for the whole of the Planck mission.

The orbit file can be downloaded here.

Orbit events file

The orbit events file .LEV is produced by the Flight Dynamics team at ESOC and contains the information of the Planck orbit events throughout the whole mission (since launch).

This product is available in the Planck Legacy Archive interface in the "Time-ordered information : Orbit events file" section. Only one orbit events file is delivered since it contains all the past information for the whole of the Planck mission.

The orbit events file can be downloaded here.