Phase II Polarimetry Example

The following Phase II example for Camera 2 includes a four position dither pattern. A dither stepping of N + 1/2 pixel offsets, where N = 10-50 pixels, is recommended. An image is obtained in each quadrant of the detector. In addition, a pattern orient of 0.11 deg is specified to achieve a 1/4 shift over 128.5 pixels. The Camera 2 scale is ~0.076"/pixel.

Pattern_Data

  Pattern_Number: 1
  Primary_Pattern:
    Pattern_Type: NIC-SPIRAL-DITH
 Pattern_Purpose: DITHER
Number_Of_Points: 4
   Point_Spacing: 9.766
Coordinate_Frame: POS-TARG
  Pattern_Orient: 0.11
  Center_Pattern: 


     Exposure_Number: 10
         Target_Name: R-Mon
              Config: NIC2
              Opmode: MULTIACCUM
            Aperture: NIC2-FIX
          Sp_Element: POL0L
          Wavelength:
 Optional_Parameters: SAMP-SEQ=STEP16,NSAMP=12
Number_of_Iterations: 2
   Time_Per_Exposure: DEF
Special_Requirements:                   
POS TARG -4.902,-4.902
                      PATTERN 1 10-30
            Comments: exp=95.945 sec


     Exposure_Number: 20
         Target_Name: R-Mon
              Config: NIC2
              Opmode: MULTIACCUM
            Aperture: NIC2-FIX
          Sp_Element: POL120L
          Wavelength:
 Optional_Parameters: SAMP-SEQ=STEP16,NSAMP=12
Number_of_Iterations: 2
   Time_Per_Exposure: DEF
Special_Requirements:
                      POS TARG -4.902,-4.902
            Comments: exp=95.945 sec


     Exposure_Number: 30
         Target_Name: R-Mon
              Config: NIC2
              Opmode: MULTIACCUM
            Aperture: NIC2-FIX
          Sp_Element: POL240L
          Wavelength:
 Optional_Parameters: SAMP-SEQ=STEP16,NSAMP=12
Number_of_Iterations: 2
   Time_Per_Exposure: DEF
Special_Requirements:
                      POS TARG -4.902,-4.902
            Comments: exp=95.945 sec