SEPos2Radec Namespace Reference

Functions
def	SEPos2Radec (SEnum, xS, yS, ParAng, brg, offAng)

Variables
float	imScl = 0.634
float	deg2rad = 3.141592654/180.0
float	rad2deg = 1.0/deg2rad
float	pAng = ParAng*deg2rad
float	bAng = brg*deg2rad
float	oAng = offAng*deg2rad
	xStp = abs(xS)
	yStp = abs(yS)
float	Xo = -47.490
	Assign Xo, Yo, and stage axis angles based on star enlarger number. More...
float	Yo = -126.47
float	xth = 0.70550*deg2rad
tuple	yth = (-89.176+180.0)*deg2rad
float	Sx = xStp / 29500.0
	Calculate Xfu,Yfu - the XY position in the UNROTATED frame. More...
float	Sy = yStp / 29500.0
float	Xfumm = Xo + Sx*np.cos(xth) + Sy*np.cos(yth)
float	Yfumm = Yo + Sx*np.sin(xth) + Sy*np.sin(yth)
float	Xfu = Xfumm / imScl
float	Yfu = Yfumm / imScl
float	Ang = bAng + pAng + oAng
	Now rotate into the focal plane frame. More...
float	Xf = Xfu*np.cos(Ang) - Yfu*np.sin(Ang)
float	Yf = Xfu*np.sin(Ang) + Yfu*np.cos(Ang)
float	xstep = -1360560.0
float	ystep = 854953.0
float	prang = 0.0
float	brg = 0.0
float	offAng = 0.0

Function Documentation

SEPos2Radec()

def SEPos2Radec.SEPos2Radec	(		SEnum,
			xS,
			yS,
			ParAng,
			brg,
			offAng
	)

Variable Documentation

Ang

float SEPos2Radec.Ang = bAng + pAng + oAng

Now rotate into the focal plane frame.

bAng

float SEPos2Radec.bAng = brg*deg2rad

brg

float SEPos2Radec.brg = 0.0

deg2rad

float SEPos2Radec.deg2rad = 3.141592654/180.0

imScl

float SEPos2Radec.imScl = 0.634

oAng

float SEPos2Radec.oAng = offAng*deg2rad

offAng

float SEPos2Radec.offAng = 0.0

pAng

float SEPos2Radec.pAng = ParAng*deg2rad

prang

float SEPos2Radec.prang = 0.0

rad2deg

float SEPos2Radec.rad2deg = 1.0/deg2rad

Sx

float SEPos2Radec.Sx = xStp / 29500.0

Calculate Xfu,Yfu - the XY position in the UNROTATED frame.

Sy

float SEPos2Radec.Sy = yStp / 29500.0

Xf

float SEPos2Radec.Xf = Xfu*np.cos(Ang) - Yfu*np.sin(Ang)

Xfu

float SEPos2Radec.Xfu = Xfumm / imScl

Xfumm

float SEPos2Radec.Xfumm = Xo + Sx*np.cos(xth) + Sy*np.cos(yth)

Xo

float SEPos2Radec.Xo = -47.490

Assign Xo, Yo, and stage axis angles based on star enlarger number.

NOTE! Xo Yo are in mm here. They are converted to arcsec below

NOTE: Some angles (xth,yth) have 180 degrees offset, because the slope was fit without regard to the 0,0 step position.

xstep

float SEPos2Radec.xstep = -1360560.0

xStp

SEPos2Radec.xStp = abs(xS)

xth

float SEPos2Radec.xth = 0.70550*deg2rad

Yf

float SEPos2Radec.Yf = Xfu*np.sin(Ang) + Yfu*np.cos(Ang)

Yfu

float SEPos2Radec.Yfu = Yfumm / imScl

Yfumm

float SEPos2Radec.Yfumm = Yo + Sx*np.sin(xth) + Sy*np.sin(yth)

Yo

float SEPos2Radec.Yo = -126.47

ystep

float SEPos2Radec.ystep = 854953.0

yStp

SEPos2Radec.yStp = abs(yS)

yth

tuple SEPos2Radec.yth = (-89.176+180.0)*deg2rad