Level 2 Help for SPOT

 An output data set

 The standard Vicar size field

 Starting line-INTERNALLY SET=1

 Starting sample-INTERNALLY SET=1

 Number of lines
 Valid: 1-2048

 Number of samples
 Valid: 1-2048

There are six options avalable. In the following 'X' is the sample
coordinate and 'Y' is the line coordinate.
  A. GAUSSIAN (DEFAULT): This specifies the spot shape to be Gaussian.
     The DN(X,Y) of the output dtat set will be given by;
     
     DN(X,Y)= DNMAX*EXP(-(X-X0)**2/(2.0*SIGMAX**2))
              *EXP(-(Y-Y0)**2/(2.0*SIGMAY**2))
  
  B. CONICAL: This specifies the spot shape to be conical;
    
     DN(X,Y)=DNMAX*(1.0-R)   Where;
    
     R=SQRT(((X-X0)/SIGMAX)**2+((Y-Y0)/SIGMAY)**2)

  C. RECPROCL: This specifies the spot shape to be reciprocal;
 
     DN(X,Y)=DNMAX*(1.0/R)   Where R is defined above.

  D. RECPSQURE: This specifies the spot shape to be the reciprocal
     squared;
 
     DN(X,Y)=DNMAX*(1.0/R**2)  Where R is defined above.

  E. EXPONENT: This specifies the spot shape to be exponential;
    
     DN(X,Y)=DNMAX*EXP(-R)  Where R is defined above.

  F. DOME: This specifies the spot shape to be dome shaped;
    
     DN(X,Y)=DNMAX*SQRT(1.0-R**2)  Where R is defined above.

  G. DISK: This specfies the spot shape to be a uniform disk;

     DN(X,Y)=DNMAX*(1.0-R)   Where;

     R=SQRT(((X-X0)/SIGMAX)**2+((Y-Y0)/SIGMAY)**2)
      where if lt 0, the equals zero and where gt 0 equals dnmax



NOTE THAT FOR NEGATIVE COMPUTED DN'S THE OUTPUT IS TRUNCATED TO ZERO.

  This specifies the variance of the DN(X,Y) distribution in the sample
  direction. For the GAUSSIAN shape, SIGMAX is the Sigma (half-width)
  of the spot. For all other spot shapes 2*SIGMAX is the entire extent
  of the spot shape in the sample direction. SIGMAX must be greater
  than 0. The default value is NS/8.

  This is the equivalent of SIGMAX in the line direction.

  This specifies the center of the spot relative to SS=1: Center=X0.
  The default is X0=NS/2.

  This specifies the center of the spot relative to SL=1: Center=Y0.
  The default is Y0=NL/2.