Issue 9063: MP-004	Logarithmic calibrations (xtce-rtf)
Source:  (, )
Nature: Uncategorized Issue
Severity: 
Summary: 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?)
Resolution: 
Revised Text: 
Actions taken:
October 12, 2005: received issue
Discussion: 

End of Annotations:=====
s is issue # 9063

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?)