XTCE12 — MP-004 Logarithmic calibrations

ource: M. Pecchioli mauro.pecchioli@esa.i
Description : It seems that logarithmic calibrations are not supported by the

standard. I think
this should be added.

-----Added after meeting with clarification by MP of 18Apr05:

What we support in S2K is the following:

In the case of parameters associated to a logarithmmic calibration, the engineering
value ‘Y’ corresponding to the raw value ‘X’ of a parameter is calculated using

the
following formula:
Y = 1 / [A0 + A1*ln(X) + A2*ln2(X) + A3*ln3(X) + A4*ln4(X)]
Resolution: Question: Would a polynomial approximation be close enough? What

forms of
logarithmic calibration are required: natural, base 10 other. What direction of
conversions are required?

Discussion: what is ln2 (a base 2 log or the second natural log?)

Merge with Calibrator Issue

XTCE12-152 contains a better description of the missing calibration capabilities.