EPOXI/EPOCh - Geometry for 04-05 June 2008 Earth Equatorial Observation #5 The EPOCh team provided the following observational geometry values covering the 04-05 June 2008 Earth Equatorial Observation for convenience. Pointing telemetry in the form of reconstructed (actual) SPICE C-kernels was available for this period, and thus the data pipline was able to compute the corresponding parameters which are available in the archived image data products. Table 1 - Reduced observational geometry parameters constructed by interpolating values in the raw look-up table (Table 2). Each of the quantities that is reported in the table is the median from the four or seven images that was collected on each 15-minute interval. Date & Time Julian CML Lat Range Helio S-O-SC Illum% ----------------------- -------------- ----- ----- ------- ------- ------ ------- 2008-06-04T16:57:30.863 2454622.206607 149.5 0.3 0.33721 1.01465 76.533 61.638 2008-06-04T17:12:31.946 2454622.217036 153.3 0.3 0.33722 1.01465 76.535 61.636 2008-06-04T17:27:25.577 2454622.227379 157.0 0.3 0.33723 1.01465 76.537 61.634 2008-06-04T17:42:31.974 2454622.237870 160.8 0.3 0.33724 1.01465 76.540 61.632 2008-06-04T17:57:29.644 2454622.248260 164.5 0.3 0.33725 1.01465 76.542 61.630 2008-06-04T18:12:31.907 2454622.258703 168.3 0.3 0.33726 1.01466 76.544 61.628 2008-06-04T18:27:25.483 2454622.269045 172.0 0.3 0.33726 1.01466 76.547 61.626 2008-06-04T18:42:31.934 2454622.279536 175.8 0.3 0.33727 1.01466 76.549 61.624 2008-06-04T18:57:29.613 2454622.289926 179.5 0.3 0.33728 1.01466 76.551 61.622 2008-06-04T19:12:31.864 2454622.300369 183.3 0.3 0.33729 1.01466 76.554 61.620 2008-06-04T19:27:25.425 2454622.310711 187.0 0.3 0.33730 1.01466 76.556 61.618 2008-06-04T19:42:31.891 2454622.321202 190.8 0.3 0.33731 1.01466 76.559 61.616 2008-06-04T19:57:29.582 2454622.331592 194.5 0.3 0.33731 1.01467 76.561 61.614 2008-06-04T20:12:31.825 2454622.342035 198.3 0.3 0.33732 1.01467 76.563 61.612 2008-06-04T20:27:25.393 2454622.352377 202.0 0.3 0.33733 1.01467 76.566 61.610 2008-06-04T20:42:31.755 2454622.362868 205.8 0.3 0.33734 1.01467 76.568 61.608 2008-06-04T20:57:29.523 2454622.373258 209.6 0.3 0.33735 1.01467 76.570 61.606 2008-06-04T21:12:31.782 2454622.383701 213.3 0.3 0.33736 1.01467 76.573 61.604 2008-06-04T21:27:25.303 2454622.394043 217.0 0.3 0.33736 1.01467 76.575 61.602 2008-06-04T21:42:31.716 2454622.404534 220.8 0.3 0.33737 1.01468 76.577 61.600 2008-06-04T21:57:29.468 2454622.414924 224.6 0.3 0.33738 1.01468 76.580 61.598 2008-06-04T22:12:31.743 2454622.425367 228.3 0.3 0.33739 1.01468 76.582 61.596 2008-06-04T22:27:25.233 2454622.435709 232.0 0.3 0.33740 1.01468 76.585 61.594 2008-06-04T22:42:31.684 2454622.446200 235.8 0.3 0.33741 1.01468 76.587 61.592 2008-06-04T22:57:29.378 2454622.456590 239.6 0.3 0.33741 1.01468 76.589 61.590 2008-06-04T23:12:31.712 2454622.467034 243.3 0.3 0.33742 1.01468 76.592 61.588 2008-06-04T23:27:25.194 2454622.477375 247.1 0.3 0.33743 1.01469 76.594 61.586 2008-06-04T23:42:31.633 2454622.487866 250.8 0.3 0.33744 1.01469 76.596 61.584 2008-06-04T23:57:29.339 2454622.498256 254.6 0.3 0.33745 1.01469 76.599 61.582 2008-06-05T00:12:31.567 2454622.508699 258.3 0.3 0.33746 1.01469 76.601 61.580 2008-06-05T00:27:25.151 2454622.519041 262.1 0.3 0.33746 1.01469 76.603 61.578 2008-06-05T00:42:31.594 2454622.529532 265.8 0.3 0.33747 1.01469 76.606 61.576 2008-06-05T00:57:29.300 2454622.539923 269.6 0.3 0.33748 1.01469 76.608 61.574 2008-06-05T01:12:31.481 2454622.550364 273.4 0.3 0.33749 1.01470 76.610 61.572 2008-06-05T01:27:25.120 2454622.560707 277.1 0.3 0.33750 1.01470 76.613 61.570 2008-06-05T01:42:31.504 2454622.571198 280.9 0.3 0.33751 1.01470 76.615 61.568 2008-06-05T01:57:29.179 2454622.581588 284.6 0.3 0.33751 1.01470 76.618 61.566 2008-06-05T02:12:31.438 2454622.592031 288.4 0.3 0.33752 1.01470 76.620 61.564 2008-06-05T02:27:24.998 2454622.602373 292.1 0.3 0.33753 1.01470 76.622 61.562 2008-06-05T02:42:31.465 2454622.612864 295.9 0.3 0.33754 1.01470 76.625 61.560 2008-06-05T02:57:29.128 2454622.623254 299.6 0.3 0.33755 1.01471 76.627 61.558 2008-06-05T03:12:31.399 2454622.633697 303.4 0.3 0.33755 1.01471 76.629 61.556 2008-06-05T03:27:24.975 2454622.644039 307.1 0.3 0.33756 1.01471 76.632 61.554 2008-06-05T03:42:31.426 2454622.654530 310.9 0.3 0.33757 1.01471 76.634 61.552 2008-06-05T03:57:29.105 2454622.664920 314.6 0.3 0.33758 1.01471 76.636 61.550 2008-06-05T04:12:31.356 2454622.675363 318.4 0.3 0.33759 1.01471 76.639 61.548 2008-06-05T04:27:24.932 2454622.685705 322.1 0.3 0.33760 1.01471 76.641 61.546 2008-06-05T04:42:31.289 2454622.696195 325.9 0.3 0.33760 1.01471 76.644 61.544 2008-06-05T04:57:29.066 2454622.706586 329.6 0.3 0.33761 1.01472 76.646 61.542 2008-06-05T05:12:31.317 2454622.717029 333.4 0.3 0.33762 1.01472 76.648 61.540 2008-06-05T05:27:24.854 2454622.727371 337.1 0.3 0.33763 1.01472 76.651 61.538 2008-06-05T05:42:31.246 2454622.737862 340.9 0.3 0.33764 1.01472 76.653 61.536 2008-06-05T05:57:29.011 2454622.748252 344.6 0.3 0.33764 1.01472 76.655 61.534 2008-06-05T06:12:31.274 2454622.758695 348.4 0.3 0.33765 1.01472 76.658 61.532 2008-06-05T06:27:24.764 2454622.769037 352.1 0.3 0.33766 1.01472 76.660 61.530 2008-06-05T06:42:31.207 2454622.779528 355.9 0.3 0.33767 1.01473 76.662 61.528 2008-06-05T06:57:28.968 2454622.789919 359.6 0.3 0.33768 1.01473 76.665 61.526 2008-06-05T07:12:31.235 2454622.800362 3.4 0.3 0.33769 1.01473 76.667 61.524 2008-06-05T07:27:24.725 2454622.810703 7.1 0.3 0.33769 1.01473 76.670 61.522 2008-06-05T07:42:31.176 2454622.821194 10.9 0.3 0.33770 1.01473 76.672 61.520 2008-06-05T07:57:28.870 2454622.831584 14.7 0.3 0.33771 1.01473 76.674 61.518 2008-06-05T08:12:31.110 2454622.842027 18.4 0.3 0.33772 1.01473 76.677 61.516 2008-06-05T08:27:24.686 2454622.852369 22.1 0.3 0.33773 1.01474 76.679 61.514 2008-06-05T08:42:31.137 2454622.862860 25.9 0.3 0.33773 1.01474 76.681 61.512 2008-06-05T08:57:28.831 2454622.873250 29.7 0.3 0.33774 1.01474 76.684 61.510 2008-06-05T09:12:31.059 2454622.883693 33.4 0.3 0.33775 1.01474 76.686 61.508 2008-06-05T09:27:24.572 2454622.894034 37.2 0.3 0.33776 1.01474 76.688 61.506 2008-06-05T09:42:31.086 2454622.904527 40.9 0.3 0.33777 1.01474 76.691 61.504 2008-06-05T09:57:28.710 2454622.914916 44.7 0.3 0.33777 1.01474 76.693 61.502 2008-06-05T10:12:30.969 2454622.925358 48.4 0.3 0.33778 1.01475 76.696 61.500 2008-06-05T10:27:24.533 2454622.935701 52.2 0.3 0.33779 1.01475 76.698 61.498 2008-06-05T10:42:30.996 2454622.946192 55.9 0.3 0.33780 1.01475 76.700 61.496 2008-06-05T10:57:28.663 2454622.956582 59.7 0.3 0.33781 1.01475 76.703 61.494 2008-06-05T11:12:30.930 2454622.967025 63.4 0.3 0.33781 1.01475 76.705 61.492 2008-06-05T11:27:24.490 2454622.977367 67.2 0.3 0.33782 1.01475 76.707 61.490 2008-06-05T11:42:30.957 2454622.987858 70.9 0.3 0.33783 1.01475 76.710 61.488 2008-06-05T11:57:28.639 2454622.998248 74.7 0.3 0.33784 1.01475 76.712 61.486 2008-06-05T12:12:30.891 2454623.008691 78.5 0.3 0.33785 1.01476 76.714 61.484 2008-06-05T12:27:24.467 2454623.019033 82.2 0.3 0.33786 1.01476 76.717 61.482 2008-06-05T12:42:30.820 2454623.029523 86.0 0.3 0.33786 1.01476 76.719 61.480 2008-06-05T12:57:28.596 2454623.039914 89.7 0.3 0.33787 1.01476 76.722 61.478 2008-06-05T13:12:30.848 2454623.050357 93.5 0.3 0.33788 1.01476 76.724 61.476 2008-06-05T13:27:24.385 2454623.060699 97.2 0.3 0.33789 1.01476 76.726 61.474 2008-06-05T13:42:30.781 2454623.071190 101.0 0.3 0.33790 1.01476 76.729 61.472 2008-06-05T13:57:28.542 2454623.081580 104.7 0.3 0.33790 1.01477 76.731 61.469 2008-06-05T14:12:30.808 2454623.092023 108.5 0.3 0.33791 1.01477 76.733 61.467 2008-06-05T14:27:24.345 2454623.102365 112.2 0.3 0.33792 1.01477 76.736 61.465 2008-06-05T14:42:30.738 2454623.112856 116.0 0.3 0.33793 1.01477 76.738 61.463 2008-06-05T14:57:28.491 2454623.123246 119.7 0.3 0.33794 1.01477 76.740 61.461 2008-06-05T15:12:30.765 2454623.133689 123.5 0.3 0.33794 1.01477 76.743 61.459 2008-06-05T15:27:24.259 2454623.144031 127.2 0.3 0.33795 1.01477 76.745 61.457 2008-06-05T15:42:30.699 2454623.154522 131.0 0.3 0.33796 1.01478 76.748 61.455 2008-06-05T15:57:28.452 2454623.164913 134.7 0.4 0.33797 1.01478 76.750 61.453 2008-06-05T16:12:30.640 2454623.175355 138.5 0.4 0.33798 1.01478 76.752 61.451 2008-06-05T16:27:24.216 2454623.185697 142.2 0.4 0.33798 1.01478 76.755 61.449 2008-06-05T16:42:30.668 2454623.196188 146.0 0.4 0.33799 1.01478 76.757 61.447 2008-06-05T16:57:28.362 2454623.206578 149.7 0.4 0.33800 1.01478 76.759 61.445 ----------------------- -------------- ----- ----- ------- ------- ------ ------- 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 (planetographic**) Lat = subspacecraft latitude on Earth (planetographic**) Range = range of spacecraft from Earth geocenter Helio = heliocentric range of Earth geocenter from Sun center at moment observed by spacecraft S-O-SC = Sun-object-spacecraft angle, in degrees Illum% = illumination percentage ** The oblateness of Earth is so tiny that the distinction between planetographic and planetocentric latitude is much less than the tenth-of-a-degree resolution used here. West longitude is used here for Earth, since Earth is an ordinary planet for EPOXI, like any other. Table 2 - Raw Observational Geometry Look-Up Table from HORIZONS system maintained by the JPL Solar System. JULIAN = dblarr(31) ; 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 *East* longitude (planetographic), converted to West longitude at the end SUBSCLAT = JULIAN ; subspacecraft latitude (planetographic) SUBSUNLO = JULIAN ; subSun *East* longitude (planetographic), converted to West longitude at the end SUBSUNLA = JULIAN ; SubSun latitude (planetographic) 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 ------------------ --------- -------- ------ -------- ------ ----- ------ ----- -------- -------------- ---------------- ------- 2454621.708333333 177.11124 -0.16861 61.740 52.22032 29.97 +0.22 105.34 +22.61 359.9977 1.014580280426 0.33680943631291 76.4198 2454621.750000000 177.14273 -0.17245 61.732 52.21501 14.96 +0.22 90.35 +22.61 359.9977 1.014586072773 0.33684368407089 76.4292 2454621.790972222 177.17369 -0.17623 61.725 52.20980 0.20 +0.22 75.60 +22.62 359.9977 1.014591758710 0.33687729628652 76.4385 2454621.791666667 177.17422 -0.17629 61.724 52.20971 359.95 +0.22 75.35 +22.62 359.9977 1.014591854998 0.33687786543192 76.4387 2454621.833333333 177.20570 -0.18013 61.716 52.20442 344.94 +0.23 60.35 +22.62 359.9978 1.014597627101 0.33691198042168 76.4481 2454621.875000000 177.23719 -0.18397 61.708 52.19915 329.93 +0.23 45.35 +22.63 359.9978 1.014603389086 0.33694602906589 76.4575 2454621.916666667 177.26867 -0.18782 61.700 52.19389 314.92 +0.24 30.35 +22.63 359.9978 1.014609140954 0.33698001139030 76.4669 2454621.958333333 177.30016 -0.19166 61.692 52.18863 299.91 +0.24 15.35 +22.64 359.9978 1.014614882709 0.33701392742070 76.4764 2454622.000000000 177.33164 -0.19550 61.684 52.18339 284.91 +0.24 0.36 +22.64 359.9979 1.014620614353 0.33704777718288 76.4858 2454622.000694444 177.33217 -0.19557 61.684 52.18330 284.66 +0.24 0.11 +22.64 359.9979 1.014620709795 0.33704834078429 76.4860 2454622.001388889 177.33269 -0.19563 61.684 52.18322 284.41 +0.24 359.86 +22.64 359.9979 1.014620805234 0.33704890436730 76.4861 2454622.041666667 177.36312 -0.19935 61.676 52.17816 269.90 +0.25 345.36 +22.65 359.9979 1.014626335890 0.33708156070267 76.4952 2454622.083333333 177.39460 -0.20320 61.668 52.17294 254.89 +0.25 330.36 +22.65 359.9979 1.014632047324 0.33711527800590 76.5047 2454622.125000000 177.42608 -0.20705 61.660 52.16774 239.88 +0.26 315.36 +22.66 359.9979 1.014637748658 0.33714892911841 76.5141 2454622.166666667 177.45756 -0.21090 61.652 52.16254 224.87 +0.26 300.36 +22.66 359.9980 1.014643439899 0.33718251406603 76.5236 2454622.208333333 177.48903 -0.21475 61.644 52.15735 209.86 +0.26 285.37 +22.67 359.9980 1.014649121049 0.33721603287459 76.5330 2454622.250000000 177.52051 -0.21860 61.636 52.15218 194.85 +0.27 270.37 +22.67 359.9980 1.014654792115 0.33724948556989 76.5424 2454622.291666667 177.55198 -0.22245 61.628 52.14702 179.84 +0.27 255.37 +22.68 359.9980 1.014660453103 0.33728287217773 76.5519 2454622.333333333 177.58345 -0.22631 61.620 52.14187 164.83 +0.28 240.37 +22.68 359.9981 1.014666104018 0.33731619272388 76.5613 2454622.375000000 177.61492 -0.23017 61.612 52.13673 149.82 +0.28 225.37 +22.68 359.9981 1.014671744866 0.33734944723407 76.5707 2454622.416666667 177.64639 -0.23402 61.604 52.13160 134.81 +0.28 210.38 +22.69 359.9981 1.014677375654 0.33738263573400 76.5802 2454622.458333333 177.67785 -0.23788 61.596 52.12648 119.80 +0.29 195.38 +22.69 359.9981 1.014682996389 0.33741575824931 76.5896 2454622.500000000 177.70932 -0.24174 61.588 52.12137 104.79 +0.29 180.38 +22.70 359.9982 1.014688607078 0.33744881480562 76.5991 2454622.541666667 177.74078 -0.24560 61.580 52.11628 89.78 +0.29 165.38 +22.70 359.9982 1.014694207730 0.33748180542848 76.6085 2454622.583333333 177.77225 -0.24946 61.572 52.11120 74.77 +0.30 150.38 +22.71 359.9982 1.014699798351 0.33751473014338 76.6180 2454622.625000000 177.80371 -0.25332 61.564 52.10612 59.76 +0.30 135.39 +22.71 359.9982 1.014705378950 0.33754758897574 76.6274 2454622.666666667 177.83517 -0.25719 61.556 52.10106 44.75 +0.31 120.39 +22.72 359.9983 1.014710949535 0.33758038195092 76.6369 2454622.708333333 177.86662 -0.26105 61.548 52.09601 29.74 +0.31 105.39 +22.72 359.9983 1.014716510116 0.33761310909420 76.6463 2454622.750000000 177.89808 -0.26492 61.540 52.09097 14.73 +0.31 90.39 +22.73 359.9983 1.014722060702 0.33764577043077 76.6558 2454622.790277778 177.92849 -0.26866 61.532 52.08611 0.22 +0.32 75.89 +22.73 359.9983 1.014727416776 0.33767728052680 76.6649 2454622.790972222 177.92901 -0.26872 61.532 52.08603 359.97 +0.32 75.64 +22.73 359.9983 1.014727509041 0.33767782326540 76.6651 2454622.791666667 177.92954 -0.26879 61.532 52.08594 359.72 +0.32 75.39 +22.73 359.9983 1.014727601302 0.33767836598575 76.6652 2454622.833333333 177.96099 -0.27266 61.524 52.08093 344.71 +0.32 60.40 +22.73 359.9984 1.014733131926 0.33771089578414 76.6747 2454622.875000000 177.99244 -0.27652 61.516 52.07592 329.71 +0.33 45.40 +22.74 359.9984 1.014738652584 0.33774335985088 76.6841 2454622.916666667 178.02390 -0.28040 61.508 52.07092 314.70 +0.33 30.40 +22.74 359.9984 1.014744163286 0.33777575821077 76.6936 2454622.958333333 178.05535 -0.28427 61.500 52.06594 299.69 +0.33 15.40 +22.75 359.9985 1.014749664044 0.33780809088854 76.7030 2454623.000000000 178.08679 -0.28814 61.492 52.06097 284.68 +0.34 0.40 +22.75 359.9985 1.014755154867 0.33784035790879 76.7125 2454623.000694444 178.08732 -0.28820 61.492 52.06089 284.43 +0.34 0.15 +22.75 359.9985 1.014755246297 0.33784089513634 76.7126 2454623.001388889 178.08784 -0.28827 61.492 52.06080 284.18 +0.34 359.90 +22.75 359.9985 1.014755337724 0.33784143234565 76.7128 2454623.041666667 178.11824 -0.29201 61.484 52.05601 269.67 +0.34 345.40 +22.76 359.9985 1.014760635768 0.33787255929601 76.7219 2454623.083333333 178.14969 -0.29589 61.476 52.05106 254.66 +0.35 330.41 +22.76 359.9985 1.014766106758 0.33790469507453 76.7314 2454623.125000000 178.18113 -0.29976 61.468 52.04612 239.65 +0.35 315.41 +22.77 359.9986 1.014771567848 0.33793676526863 76.7408 2454623.166666667 178.21257 -0.30364 61.460 52.04119 224.64 +0.35 300.41 +22.77 359.9986 1.014777019051 0.33796876990239 76.7503 2454623.208333333 178.24401 -0.30752 61.452 52.03627 209.63 +0.36 285.41 +22.77 359.9986 1.014782460379 0.33800070899979 76.7598 2454623.250000000 178.27545 -0.31140 61.444 52.03136 194.62 +0.36 270.41 +22.78 359.9986 1.014787891845 0.33803258258467 76.7692 2454623.291666667 178.30689 -0.31528 61.436 52.02647 179.61 +0.36 255.42 +22.78 359.9987 1.014793313461 0.33806439068072 76.7787 2454623.333333333 178.33833 -0.31916 61.428 52.02158 164.60 +0.37 240.42 +22.79 359.9987 1.014798725242 0.33809613331148 76.7881 2454623.375000000 178.36977 -0.32304 61.420 52.01671 149.59 +0.37 225.42 +22.79 359.9987 1.014804127199 0.33812781050034 76.7976 2454623.416666667 178.40120 -0.32693 61.412 52.01185 134.58 +0.38 210.42 +22.80 359.9987 1.014809519346 0.33815942227054 76.8071 2454623.458333333 178.43263 -0.33081 61.404 52.00699 119.57 +0.38 195.42 +22.80 359.9988 1.014814901699 0.33819096864516 76.8165 2454623.500000000 178.46407 -0.33470 61.396 52.00215 104.56 +0.38 180.43 +22.80 359.9988 1.014820274270 0.33822244964711 76.8260 Code to convert from East to West longitude: SUBSCLON = 360 - SUBSCLON SUBSCLON[ 3:*] = 360 + SUBSCLON[ 3:*] SUBSCLON[30:*] = 360 + SUBSCLON[30:*] SUBSUNLO = 360 - SUBSUNLO SUBSUNLO[10:*] = 360 + SUBSUNLO[10:*] SUBSUNLO[38:*] = 360 + SUBSUNLO[38:*]