; Simple function that accepts an ET start time and determines the count rate ; of the dark image. The count rate is calculated as the total number of ; counts in [50:950,*] divided by the image exposure time. ; MODIFICATION HISTORY: ; v1. 2009 Nov 10 AJS Update to include PC10 dark rate ; v2. 2009 Nov 12 AJS Update to include ESB3 dark rate FUNCTION ra_darkrate, et_start CASE 1 OF et_start LE 1.3664166e+08: darkrate = 18.3288 et_start LE 1.3932006e+08: darkrate = 18.5772 et_start LE 1.4986086e+08: darkrate = 18.4428 et_start LE 1.6558566e+08: darkrate = 18.8404 et_start LE 1.7344806e+08: darkrate = 22.3169 et_start LE 1.7612646e+08: darkrate = 22.2305 et_start LE 2.1820327e+08: BEGIN CASE 1 OF hvsetc LE -3900 AND hvsetc GT -4000: darkrate = 27.0671 hvsetc LE -3800 AND hvsetc GT -3900: darkrate = 24.7518 ; ELSE: darkrate = 27.0671 ENDCASE END et_start LE 2.2088167e+08: darkrate = 19.6595 et_start LE 2.3392807e+08: darkrate = 24.7518 et_start LE 2.4446887e+08: darkrate = 30.0374 et_start LE 2.4973927e+08: darkrate = 29.7291 et_start LE 2.7082087e+08: darkrate = 30.7919 ; PC8 et_start LE 2.7609127e+08: darkrate = 31.4184 ; Steins et_start LE 3.0762727e+08: darkrate = 33.8934 ; PC10 et_start LE 3.1194727e+08: darkrate = 33.7288 ; ESB3 et_start LE 3.2706727e+08: darkrate = 31.0127 ; PC12 et_start LE 3.1194727e+08: darkrate = 31.733652 ; Lutetia ELSE: darkrate = 31.733652 ENDCASE return, darkrate END