FTS scan parameters

FTS scan parameter Definitions


LAMBDA_REF       = 6328.164                                Reference wavelength
SIGMA_REF        = 15798.0025                              Reference wavenumber
Fz               = 1550000.0                               Zeeman frequency
scanSize         = M * S                                   Length in points
scanFringes      = K * S                                   Length in fringes
samplesPerFringe = M / K                                   Samples per Fringe
pathDiffVariation= scanFringes / SIGMA_REF                 Length in cm
scanFrequency    = Fz / K                                  2.5KHz if K = 620
balanceRatio     = longSide / (1 + longSide)                
rightSideFringes = balanceRatio * scanFringes              Long side fringes
maxAp            = 7543.4151 / sqrt(resPower)              Max apperture, cm
resolvingPower   = scanSize *  aliasOrder * balanceRatio   Points on long side
centralFringePt  = scanSize - (scanSize * balanceRatio)    Points to the WLF
scanSeconds      = scanSize / scanFrequency                Sec's for one scan
scanMinutes      = scanSec/60                              Min'sfor one scan
scanTime         = INT(scanMin) : scanSec - (60*scanMin)   Time for on scan
scanVelocity     = Fz / M / SIGMA_REF                      cm/sec
minLambda        = LAMBDA_REF*2 / (samplesPerFringe*Alias) A
maxSigma         = (samplesPerFringe / 2)*SIGNMA_REF*Alias cm-1
resLimit         = SIGMA_REF/(balanceRatio*2*scanFringes)  Resolution in cm-1
spectralRange    = SIGMA_REF * M / (2 * K)                 Total range in cm-1
aliasHi          = Alias * specralRange                    Maximum cm-1 value
aliasLo          = (Alias - 1) * specralRange              Minimum cm-1 value

Return to the FTS Notes book.