XMM-Newton Mission Status & Performance Indicator

Index

Legend for the Efficiency Breakdown

Data is provided for the past 6 months.

The "revolution breakdown" charts include parts of the revolution falling within the science window (available for science) and parts within the radiation belts (not available for science).

The "science window breakdown" charts are divided into the following components:

Scheduled science the total duration of all science observations scheduled in the period under consideration, excluding slew time and exposure overhead.
Performed science refers to the above, minus time lost due to a variety of causes: e.g. unforeseeable LEOP support to other spacecraft leading to the cancellation of scheduled revolutions, science observations which had to be terminated due to high radiation levels, etc ...
Calibration Obs time spent for (non-) routine calibration observations
Engineering Obs
includes a) time spent for engineering activities related to instrument (mode) testing and fine-tuning (mostly before the year 2008)
  b) EPIC cal/closed filter observations performed in parallel to MOC spacecraft test and calibration activities
Slews time spent slewing between targets (includes star tracker field acquisition and locking on a guide star)
S/C-activities time where no activity could be scheduled. Such as planned tests, maintenance or calibration of star tracker, fine Sun Sensor, thruster torque etc. Extra post-slew margins requested for a few special manoeuvres. Problems with ground-station handovers. Special instrument tests that need to be manually commanded are also included here. For MOS, it contains observations which require telemetry allocation shifted to pn or RGS.
Overheads time spent to configure the instruments at the start and end of each observation/exposure.
High radiation time lost due to high radiation coming from the sun.
Contingencies
includes a) time lost due to ground segment problems (slew parameters not computed in time, transmission drops, ground station antenna or link problems...)
  b) time lost because of XMM-Newton spacecraft problems
  c) time lost due to instrument anomalies
  d) time not used because of Ground Station support to other spacecraft (ENVISAT, MSG ...)

Total scheduled and performed science time figures for the past 6 months are also presented.
 

Legend for the Evolution of Efficiency

These diagrams show the evolution of the instrument efficiency since the start of the routine phase (revolution 103, 01/07/2000).

The performed science time and the main contingencies are displayed:

Scheduled science the total duration of all science observations scheduled in the period under consideration, excluding slew time and exposure overhead.
Performed science refers to the above, minus time lost due to a variety of causes: e.g. unforseeable LEOP support to other spacecraft leading to the cancellation of scheduled revolutions, science observations which had to be terminated due to high radiation levels, etc ...
Solar flares time lost due to high radiation coming from the sun.
G/S problem time lost due to ground segment problems (slew parameters not computed in time, transmission drops, ground station antenna or link problems...)
Inst problem time lost because of instrument anomalies.
Support other S/C time lost because the ground-segment antenna had to be used to support other spacecraft (ENVISAT, MSG ...) or for emergencies.
S/C problem problems in the spacecraft.
Science Window time theoretically available for science observations.


Total scheduled and performed science time figures since the start of the routine phase are also presented.

Index