EPOXI/EPOCh - Geometry for 28-29 May 2008 Earth Equatorial Observation #4 The EPOCh team provided the following observational geometry values covering the 28-29 May 2008 Earth Equatorial Observation because corresponding parameters in some archival data products for this period are based on predicted (estimated) pointing SPICE C-kernels. Due to memory limitations on board the spacecraft, some attitude information for this period was overwritten and thus reconstructed (actual) pointing data were not generated nor available to the data pipeline. The EPOCh team used the HORIZONS system maintained by the JPL Solar System group to generate a raw look-up table of observational geometry parameters (see the second table below). To aid analysis, the EPOCh team constructed reduced values in the first table below by interpolating the raw look-up table from HORIZONS. Table 1 - Reduced observational geometry parameters constructed by interpolating values in the raw look-up table (Table 2). Date & Time Julian CML Lat Range Helio S-O-SC Illum% ----------------------- -------------- ----- ----- ------- ------- ------ ------- 2008-05-28T20:03:52.662 2454615.336026 194.6 -0.4 0.33078 1.01358 74.987 62.951 2008-05-28T20:18:53.746 2454615.346455 198.3 -0.4 0.33079 1.01358 74.990 62.949 2008-05-28T20:33:47.388 2454615.356798 202.0 -0.4 0.33080 1.01359 74.992 62.947 2008-05-28T20:48:53.773 2454615.367289 205.8 -0.4 0.33081 1.01359 74.994 62.945 2008-05-28T21:03:51.444 2454615.377679 209.6 -0.3 0.33082 1.01359 74.997 62.943 2008-05-28T21:18:53.706 2454615.388122 213.3 -0.3 0.33084 1.01359 74.999 62.941 2008-05-28T21:33:47.263 2454615.398464 217.1 -0.3 0.33085 1.01359 75.001 62.939 2008-05-28T21:48:53.734 2454615.408955 220.8 -0.3 0.33086 1.01359 75.004 62.937 2008-05-28T22:03:51.405 2454615.419345 224.6 -0.3 0.33087 1.01360 75.006 62.936 2008-05-28T22:18:53.663 2454615.429788 228.3 -0.3 0.33088 1.01360 75.008 62.934 2008-05-28T22:33:47.177 2454615.440129 232.1 -0.3 0.33089 1.01360 75.011 62.932 2008-05-28T22:48:53.691 2454615.450621 235.8 -0.3 0.33090 1.01360 75.013 62.930 2008-05-28T23:03:51.377 2454615.461011 239.6 -0.3 0.33091 1.01360 75.015 62.928 2008-05-28T23:18:53.624 2454615.471454 243.3 -0.3 0.33092 1.01361 75.018 62.926 2008-05-28T23:33:47.142 2454615.481796 247.1 -0.3 0.33093 1.01361 75.020 62.924 2008-05-28T23:48:53.566 2454615.492287 250.9 -0.3 0.33095 1.01361 75.022 62.922 2008-05-29T00:03:51.318 2454615.502677 254.6 -0.3 0.33096 1.01361 75.025 62.920 2008-05-29T00:18:53.593 2454615.513120 258.4 -0.3 0.33097 1.01361 75.027 62.918 2008-05-29T00:33:47.103 2454615.523462 262.1 -0.3 0.33098 1.01361 75.029 62.916 2008-05-29T00:48:53.515 2454615.533953 265.9 -0.3 0.33099 1.01362 75.032 62.914 2008-05-29T01:03:51.221 2454615.544343 269.6 -0.3 0.33100 1.01362 75.034 62.912 2008-05-29T01:18:53.542 2454615.554786 273.4 -0.3 0.33101 1.01362 75.036 62.910 2008-05-29T01:33:47.032 2454615.565128 277.1 -0.3 0.33102 1.01362 75.039 62.908 2008-05-29T01:48:53.476 2454615.575619 280.9 -0.3 0.33103 1.01362 75.041 62.906 2008-05-29T02:03:51.182 2454615.586009 284.6 -0.3 0.33105 1.01363 75.043 62.904 2008-05-29T02:18:53.503 2454615.596453 288.4 -0.3 0.33106 1.01363 75.046 62.902 2008-05-29T02:33:46.993 2454615.606794 292.1 -0.3 0.33107 1.01363 75.048 62.900 2008-05-29T02:48:53.386 2454615.617285 295.9 -0.3 0.33108 1.01363 75.050 62.898 2008-05-29T03:03:51.139 2454615.627675 299.6 -0.3 0.33109 1.01363 75.053 62.896 2008-05-29T03:18:53.319 2454615.638117 303.4 -0.3 0.33110 1.01363 75.055 62.894 2008-05-29T03:33:46.950 2454615.648460 307.1 -0.3 0.33111 1.01364 75.057 62.892 2008-05-29T03:48:53.347 2454615.658951 310.9 -0.3 0.33112 1.01364 75.060 62.890 2008-05-29T04:03:51.100 2454615.669341 314.6 -0.3 0.33113 1.01364 75.062 62.888 2008-05-29T04:18:53.280 2454615.679783 318.4 -0.3 0.33115 1.01364 75.064 62.886 2008-05-29T04:33:46.919 2454615.690126 322.1 -0.3 0.33116 1.01364 75.067 62.884 2008-05-29T04:48:53.308 2454615.700617 325.9 -0.3 0.33117 1.01364 75.069 62.882 2008-05-29T05:03:50.986 2454615.711007 329.6 -0.3 0.33118 1.01365 75.071 62.880 2008-05-29T05:18:53.237 2454615.721449 333.4 -0.3 0.33119 1.01365 75.074 62.878 2008-05-29T05:33:46.817 2454615.731792 337.1 -0.3 0.33120 1.01365 75.076 62.876 2008-05-29T05:48:53.265 2454615.742283 340.9 -0.3 0.33121 1.01365 75.078 62.874 2008-05-29T06:03:50.947 2454615.752673 344.6 -0.3 0.33122 1.01365 75.081 62.873 2008-05-29T06:18:53.198 2454615.763116 348.4 -0.3 0.33123 1.01366 75.083 62.871 2008-05-29T06:33:46.759 2454615.773458 352.1 -0.3 0.33124 1.01366 75.085 62.869 2008-05-29T06:48:53.226 2454615.783949 355.9 -0.3 0.33125 1.01366 75.088 62.867 2008-05-29T07:03:50.892 2454615.794339 359.7 -0.3 0.33127 1.01366 75.090 62.865 2008-05-29T07:18:53.159 2454615.804782 3.4 -0.3 0.33128 1.01366 75.092 62.863 2008-05-29T07:33:46.677 2454615.815124 7.1 -0.3 0.33129 1.01366 75.095 62.861 2008-05-29T07:48:53.089 2454615.825614 10.9 -0.3 0.33130 1.01367 75.097 62.859 2008-05-29T08:03:50.857 2454615.836005 14.7 -0.3 0.33131 1.01367 75.099 62.857 2008-05-29T08:18:53.116 2454615.846448 18.4 -0.3 0.33132 1.01367 75.102 62.855 2008-05-29T08:33:46.606 2454615.856789 22.1 -0.3 0.33133 1.01367 75.104 62.853 2008-05-29T08:48:53.057 2454615.867281 25.9 -0.3 0.33134 1.01367 75.106 62.851 2008-05-29T09:03:50.752 2454615.877671 29.7 -0.3 0.33135 1.01367 75.109 62.849 2008-05-29T09:18:53.085 2454615.888114 33.4 -0.3 0.33136 1.01368 75.111 62.847 2008-05-29T09:33:46.567 2454615.898456 37.2 -0.3 0.33138 1.01368 75.113 62.845 2008-05-29T09:48:53.007 2454615.908947 40.9 -0.3 0.33139 1.01368 75.116 62.843 2008-05-29T10:03:50.720 2454615.919337 44.7 -0.3 0.33140 1.01368 75.118 62.841 2008-05-29T10:18:53.034 2454615.929781 48.4 -0.3 0.33141 1.01368 75.120 62.839 2008-05-29T10:33:46.524 2454615.940122 52.2 -0.3 0.33142 1.01369 75.123 62.837 2008-05-29T10:48:52.968 2454615.950613 55.9 -0.3 0.33143 1.01369 75.125 62.835 2008-05-29T11:03:50.673 2454615.961003 59.7 -0.3 0.33144 1.01369 75.127 62.833 2008-05-29T11:18:52.854 2454615.971445 63.5 -0.3 0.33145 1.01369 75.130 62.831 2008-05-29T11:33:46.485 2454615.981788 67.2 -0.3 0.33146 1.01369 75.132 62.829 2008-05-29T11:48:52.878 2454615.992279 71.0 -0.3 0.33147 1.01369 75.134 62.827 2008-05-29T12:03:50.630 2454616.002669 74.7 -0.3 0.33148 1.01370 75.137 62.825 2008-05-29T12:18:52.811 2454616.013111 78.5 -0.3 0.33150 1.01370 75.139 62.823 2008-05-29T12:33:46.383 2454616.023454 82.2 -0.3 0.33151 1.01370 75.141 62.821 2008-05-29T12:48:52.839 2454616.033945 86.0 -0.3 0.33152 1.01370 75.144 62.819 2008-05-29T13:03:50.505 2454616.044335 89.7 -0.3 0.33153 1.01370 75.146 62.818 2008-05-29T13:18:52.772 2454616.054778 93.5 -0.3 0.33154 1.01370 75.148 62.816 2008-05-29T13:33:46.344 2454616.065120 97.2 -0.3 0.33155 1.01371 75.151 62.814 2008-05-29T13:48:52.799 2454616.075611 101.0 -0.3 0.33156 1.01371 75.153 62.812 2008-05-29T14:03:50.482 2454616.086001 104.7 -0.3 0.33157 1.01371 75.155 62.810 2008-05-29T14:18:52.729 2454616.096444 108.5 -0.3 0.33158 1.01371 75.158 62.808 2008-05-29T14:33:46.293 2454616.106786 112.2 -0.3 0.33159 1.01371 75.160 62.806 2008-05-29T14:48:52.756 2454616.117277 116.0 -0.3 0.33160 1.01372 75.162 62.804 2008-05-29T15:03:50.423 2454616.127667 119.7 -0.3 0.33161 1.01372 75.165 62.802 2008-05-29T15:18:52.690 2454616.138110 123.5 -0.3 0.33163 1.01372 75.167 62.800 2008-05-29T15:33:46.254 2454616.148452 127.2 -0.3 0.33164 1.01372 75.169 62.798 2008-05-29T15:48:52.620 2454616.158942 131.0 -0.3 0.33165 1.01372 75.172 62.796 2008-05-29T16:03:50.384 2454616.169333 134.7 -0.3 0.33166 1.01372 75.174 62.794 2008-05-29T16:18:52.647 2454616.179776 138.5 -0.3 0.33167 1.01373 75.176 62.792 2008-05-29T16:33:46.137 2454616.190117 142.2 -0.3 0.33168 1.01373 75.179 62.790 2008-05-29T16:48:52.580 2454616.200609 146.0 -0.3 0.33169 1.01373 75.181 62.788 2008-05-29T17:03:50.333 2454616.210999 149.7 -0.3 0.33170 1.01373 75.183 62.786 2008-05-29T17:18:52.608 2454616.221442 153.5 -0.3 0.33171 1.01373 75.186 62.784 2008-05-29T17:33:46.098 2454616.231783 157.2 -0.3 0.33172 1.01373 75.188 62.782 2008-05-29T17:48:52.549 2454616.242275 161.0 -0.3 0.33173 1.01374 75.190 62.780 2008-05-29T18:03:50.243 2454616.252665 164.8 -0.3 0.33174 1.01374 75.193 62.778 2008-05-29T18:18:52.576 2454616.263108 168.5 -0.3 0.33176 1.01374 75.195 62.776 2008-05-29T18:33:46.059 2454616.273450 172.2 -0.3 0.33177 1.01374 75.197 62.774 2008-05-29T18:48:52.498 2454616.283941 176.0 -0.3 0.33178 1.01374 75.200 62.772 2008-05-29T19:03:50.204 2454616.294331 179.8 -0.3 0.33179 1.01375 75.202 62.770 2008-05-29T19:18:52.432 2454616.304774 183.5 -0.3 0.33180 1.01375 75.204 62.768 2008-05-29T19:33:46.016 2454616.315116 187.2 -0.3 0.33181 1.01375 75.207 62.766 2008-05-29T19:48:52.459 2454616.325607 191.0 -0.3 0.33182 1.01375 75.209 62.764 2008-05-29T20:03:50.165 2454616.335997 194.8 -0.3 0.33183 1.01375 75.211 62.762 ----------------------- -------------- ----- ----- ------- ------- ------ ------- Date & Time = UTC date and time at spacecraft at moment of spacecraft measurement of event (i.e., light travel time of event detection is accounted for) Julian = Julian date and time CML = subspacecraft central meridian West longitude of Earth image at moment of image arrival at spacecraft Lat = subspacecraft latitude on Earth Range = range of spacecraft from Earth geocenter, in AU Helio = heliocentric range of Earth geocenter from Sun center at moment observed by spacecraft, in AU S-O-SC = Sun-object-spacecraft angle, in degrees Illum% = illumination percentage Table 2 - Raw Observational Geometry Look-Up Table from Horizons. JULIAN = dblarr(42) ; Julian date RA = JULIAN ; astrometric right ascension from spacecraft, in degrees DEC = JULIAN ; astrometric declination from spacecraft, in degrees ILLUM_FRAC = JULIAN ; illumination fraction (in percentage) EQ_DIAM = JULIAN ; apparent equatorial diameter, in arcsec SUBSCLON = JULIAN ; subspacecraft central meridian West longitude SUBSCLAT = JULIAN ; subspacecraft latitude SUBSUNLO = JULIAN ; subSun central meridian West longitude SUBSUNLA = JULIAN ; SubSun latitude NPPA = JULIAN ; North Pole Position Angle, ccw positive from Cel. N., in degrees RANGE_HELIO = JULIAN ; heliocentric range, in AU RANGE_TARGET = JULIAN ; geocentric range of spacecraft, in AU PHASE_ANGLE = JULIAN ; phase angle = Sun-object-spacecraft angle, in degrees SUB SUB SUB SUB JULIAN RA DEC ILL_FR EQ_DIAM SCLON SCLAT SUNLO SUNLA NPPA RANGE_HELIO RANGE_TARGET PH_ANG ------------------ --------- -------- ------ -------- ------ ----- ------ ----- -------- -------------- ---------------- ------- 2454614.958333333 171.99419 +0.43140 63.023 53.23781 301.49 -0.39 15.07 +21.69 359.9935 1.013516837899 0.33037229664890 74.9029 2454615.000000000 172.02585 +0.42787 63.015 53.23053 286.49 -0.38 0.07 +21.70 359.9935 1.013524073074 0.33041747362699 74.9122 2454615.000694444 172.02638 +0.42781 63.015 53.23041 286.23 -0.38 359.82 +21.70 359.9935 1.013524193601 0.33041822600758 74.9124 2454615.041666667 172.05751 +0.42433 63.007 53.22326 271.48 -0.38 345.08 +21.70 359.9936 1.013531301274 0.33046258343339 74.9215 2454615.083333333 172.08917 +0.42078 62.999 53.21601 256.47 -0.38 330.08 +21.71 359.9936 1.013538522474 0.33050762604892 74.9309 2454615.125000000 172.12083 +0.41724 62.991 53.20877 241.46 -0.37 315.08 +21.72 359.9936 1.013545736648 0.33055260145461 74.9402 2454615.166666667 172.15248 +0.41369 62.983 53.20154 226.45 -0.37 300.08 +21.72 359.9937 1.013552943770 0.33059750963172 74.9495 2454615.208333333 172.18414 +0.41014 62.976 53.19432 211.44 -0.37 285.08 +21.73 359.9937 1.013560143815 0.33064235056173 74.9588 2454615.250000000 172.21579 +0.40659 62.968 53.18712 196.43 -0.36 270.08 +21.73 359.9937 1.013567336757 0.33068712422634 74.9681 2454615.291666667 172.24745 +0.40304 62.960 53.17993 181.42 -0.36 255.08 +21.74 359.9937 1.013574522570 0.33073183060746 74.9775 2454615.333333333 172.27910 +0.39948 62.952 53.17275 166.41 -0.36 240.09 +21.75 359.9938 1.013581701229 0.33077646968724 74.9868 2454615.375000000 172.31076 +0.39592 62.944 53.16559 151.40 -0.35 225.09 +21.75 359.9938 1.013588872707 0.33082104144806 74.9961 2454615.416666667 172.34241 +0.39236 62.936 53.15844 136.39 -0.35 210.09 +21.76 359.9938 1.013596036980 0.33086554587254 75.0054 2454615.458333333 172.37406 +0.38880 62.928 53.15130 121.38 -0.34 195.09 +21.77 359.9938 1.013603194019 0.33090998294350 75.0148 2454615.500000000 172.40572 +0.38523 62.921 53.14417 106.37 -0.34 180.09 +21.77 359.9939 1.013610343801 0.33095435264403 75.0241 2454615.541666667 172.43737 +0.38166 62.913 53.13706 91.36 -0.34 165.09 +21.78 359.9939 1.013617486298 0.33099865495745 75.0334 2454615.583333333 172.46902 +0.37809 62.905 53.12996 76.35 -0.33 150.09 +21.79 359.9939 1.013624621484 0.33104288986733 75.0427 2454615.625000000 172.50067 +0.37451 62.897 53.12287 61.35 -0.33 135.10 +21.79 359.9939 1.013631749332 0.33108705735744 75.0521 2454615.666666667 172.53232 +0.37094 62.889 53.11580 46.34 -0.33 120.10 +21.80 359.9940 1.013638869818 0.33113115741185 75.0614 2454615.708333333 172.56397 +0.36736 62.881 53.10874 31.33 -0.32 105.10 +21.81 359.9940 1.013645982913 0.33117519001485 75.0707 2454615.750000000 172.59561 +0.36378 62.873 53.10169 16.32 -0.32 90.10 +21.81 359.9940 1.013653088593 0.33121915515097 75.0800 2454615.791666667 172.62726 +0.36019 62.866 53.09465 1.31 -0.32 75.10 +21.82 359.9940 1.013660186829 0.33126305280504 75.0894 2454615.795138889 172.62990 +0.35990 62.865 53.09406 0.06 -0.32 73.85 +21.82 359.9940 1.013660778012 0.33126670789634 75.0901 2454615.795833333 172.63043 +0.35984 62.865 53.09395 359.81 -0.32 73.60 +21.82 359.9940 1.013660896242 0.33126743885835 75.0903 2454615.833333333 172.65891 +0.35661 62.858 53.08763 346.30 -0.31 60.10 +21.82 359.9941 1.013667277596 0.33130688296209 75.0987 2454615.875000000 172.69055 +0.35302 62.850 53.08061 331.29 -0.31 45.10 +21.83 359.9941 1.013674360868 0.33135064560745 75.1080 2454615.916666667 172.72220 +0.34943 62.842 53.07362 316.28 -0.31 30.11 +21.84 359.9941 1.013681436617 0.33139434072668 75.1173 2454615.958333333 172.75384 +0.34584 62.834 53.06663 301.27 -0.30 15.11 +21.84 359.9941 1.013688504816 0.33143796830562 75.1267 2454616.000000000 172.78549 +0.34224 62.826 53.05966 286.26 -0.30 0.11 +21.85 359.9942 1.013695565440 0.33148152833037 75.1360 2454616.000694444 172.78601 +0.34218 62.826 53.05954 286.01 -0.30 359.86 +21.85 359.9942 1.013695683053 0.33148225375838 75.1361 2454616.041666667 172.81713 +0.33865 62.818 53.05270 271.25 -0.29 345.11 +21.86 359.9942 1.013702618461 0.33152502078731 75.1453 2454616.083333333 172.84877 +0.33505 62.810 53.04575 256.24 -0.29 330.11 +21.86 359.9942 1.013709663852 0.33156844566307 75.1546 2454616.125000000 172.88041 +0.33144 62.803 53.03881 241.23 -0.29 315.11 +21.87 359.9942 1.013716701587 0.33161180294457 75.1640 2454616.166666667 172.91205 +0.32784 62.795 53.03189 226.22 -0.28 300.12 +21.88 359.9943 1.013723731639 0.33165509261899 75.1733 2454616.208333333 172.94369 +0.32423 62.787 53.02498 211.21 -0.28 285.12 +21.88 359.9943 1.013730753981 0.33169831467379 75.1826 2454616.250000000 172.97533 +0.32062 62.779 53.01808 196.21 -0.28 270.12 +21.89 359.9943 1.013737768586 0.33174146909673 75.1920 2454616.291666667 173.00697 +0.31701 62.771 53.01120 181.20 -0.27 255.12 +21.89 359.9943 1.013744775426 0.33178455587582 75.2013 2454616.333333333 173.03861 +0.31340 62.763 53.00432 166.19 -0.27 240.12 +21.90 359.9944 1.013751774476 0.33182757499940 75.2106 2454616.375000000 173.07024 +0.30978 62.755 52.99746 151.18 -0.27 225.12 +21.91 359.9944 1.013758765707 0.33187052645606 75.2200 2454616.416666667 173.10188 +0.30617 62.748 52.99062 136.17 -0.26 210.12 +21.91 359.9944 1.013765749094 0.33191341023468 75.2293 2454616.458333333 173.13351 +0.30255 62.740 52.98378 121.16 -0.26 195.13 +21.92 359.9944 1.013772724609 0.33195622632445 75.2386 2454616.500000000 173.16515 +0.29892 62.732 52.97696 106.15 -0.25 180.13 +21.92 359.9945 1.013779692224 0.33199897471485 75.2479 SUBSCLON = 360 - SUBSCLON SUBSCLON[23:*] = 360 + SUBSCLON[23:*] SUBSUNLO = 360 - SUBSUNLO SUBSUNLO[ 2:*] = 360 + SUBSUNLO[ 2:*] SUBSUNLO[29:*] = 360 + SUBSUNLO[29:*]