if (localDefinitionNumber ==35) {
	alias mars.date   = dataDate;
	alias mars.time   = dataTime;
} else {
	# era 40
	alias mars.date   = dateOfAnalysis;
	alias mars.time   = timeOfAnalysis;
}

if (class is "od") { alias mars.origin = centre; }


# We need this because 'jDirectionIncrementInDegrees,iDirectionIncrementInDegrees,' is defined later
meta marsGrid sprintf("%g/%g",iDirectionIncrementInDegrees,jDirectionIncrementInDegrees) : dump;
alias mars.grid = marsGrid;