CALIFORNIA INSTITUTE OF TECHNOLOGY DIVISION OF GEOLOGICAL AND PLANETARY SCIENCES PASADENA, CALIFORNIA MARS OBSERVER CAMERA PROJECT 55 N. St. John Ave., Pasadena, CA 91103 (818) 796-4266 To: Voyager Colleagues Date: May 14, 1990 From: Ed Danielson Subject: Update Calibration Factors for Voyager 2 Cameras Torrence Johnson and I discussed the accuracy of the last attempt to update the Calibration factors for the Voyager 2 Cameras from the "Danielson et al" paper. We were satisfied the figures given out on the 8/18/89 notes from Torrence were still the ones to use. However a final check showed that one of the blue filters was not converted correctly. Attached is a copy of the corrected calibration factors along with a copy of the "Danielson et al" paper. Happy Photometry!! Date: 03-May-90 CALIBRATIONS BASED ON CORR. TO DANIELSON ET AL IN VGRCAL88.WK1 VOYAGER 2 CALIBRATION FACTORS: NARROW ANGLE CAMERA CAL88.WK1 --------------------------------------------------------------------------------------------------- Filter Clear Violet Blue Orange Green Ultraviolet Ultraviolet Ultraviolet # 0,4 1 2 3 5,6 7 Atm. corr. 1989 Sat. Corr. 1989 --------------------------------------------------------------------------------------------------- J IPL Corr.factor 0.939 0.930 1.000 0.947 0.938 3.094 2.873 3.319 S IPL Corr.factor 3.141 3.111 3.345 3.167 3.137 10.348 9.609 11.101 U IPL Corr.factor 12.698 12.576 13.523 12.806 12.684 41.839 38.850 44.881 N IPL Corr.factor 31.699 31.396 33.759 31.970 31.666 104.450 96.989 112.045 J omega 0(5.2au) 2103.093 635.787 909.510 208.439 513.127 70.565 76.013 65.794 S omega 0(9.51au) 628.788 190.089 271.928 62.320 153.415 21.098 22.727 19.671 U omega 0(19.122au 155.524 47.017 67.259 15.414 37.946 5.218 5.621 4.865 N omega 0(30.21au) 62.298 18.833 26.941 6.174 15.200 2.090 2.252 1.949 --------------------------------------------------------------------------------------------------- VOYAGER 2 CALIBRATION FACTORS: WIDE ANGLE ANGLE CAMERA ------------------------------------------------------------------------------------------ Filter Blue Clear Violet Green Orange CH4 CH4 # 1 2 3 5 7 5410 6190 ------------------------------------------------------------------------------------------ J IPL Corr.factor 1.088 1.022 0.945 0.909 0.898 0.9147 1.4297 S IPL Corr.factor 3.572 3.418 3.161 3.040 3.004 3.059 4.782 U IPL Corr.factor 14.442 13.820 12.779 12.292 12.143 12.369 19.333 N IPL Corr.factor 36.054 34.501 31.902 30.687 30.315 30.879 48.265 J omega 0(5.2au) 6099.45 11447.76 2439.174 3719.742 1061.443 S omega 0(9.51au) 1823.628 3422.679 729.270 1112.137 317.353 U omega 0(19.122au) 451.056 846.566 180.378 275.076 78.494 N omega 0(30.21au) 180.677 339.105 72.253 110.186 31.442 0.000 0.000 ------------------------------------------------------------------------------------------ *NOTE:5/4/90: BLUE CHANGED FROM 1.00 TO 1.068 PER DANIELSON ET AL. PREVIOUS VERSION WAS NOT CONSISTENT WITH POLLACK AND REID CHANGES TO OTHER FILTERS PREVIOUS VERSION- 15 AUG 89 SPREADSHEET