Orbital Analysis for matched events on 20210813_002444.571_UK

Summary for Event
-----------------
shower ID 12 KCG
Lg 309.43° Bg 72.91° Vg 23.01km/s
mass 0.13253g, abs. mag -0.2
Path Details
------------
start 1.37° 52.24° 94.30km
end   1.44° 52.23° 82.72km

Orbit Details
-------------
Semimajor axis 3.18A.U., eccentricity 0.69, inclination 35.65°, Period 5.68Y, LA Sun 140.20°, last Perihelion 2015-12-28

Full details below
Click here to download a zip of the raw and processed data.

Detailed report below graphs

Click on an image to see a larger view


Input measurement type: Azimuth +east of due north for meas1, Elevation angle above the horizon for meas2

Uncertainties type:
 Purely geometric uncertainties

Reference JD: 2459439.517182540614
Time: 2021-08-13 00:24:44.571509 UTC


Plane intersections
-------------------
Intersection 1 - Stations: UK002F and UK002K
 Convergence angle = 55.37606 deg
 R.A. = 290.93638  Dec = +52.68698 deg
Intersection 2 - Stations: UK002F and UK0032
 Convergence angle = 45.26171 deg
 R.A. = 290.78467  Dec = +52.61297 deg
Intersection 3 - Stations: UK002K and UK0032
 Convergence angle = 10.11475 deg
 R.A. = 291.68911  Dec = +52.54786 deg

Best intersection: Stations UK002F and UK002K with Qconv = 55.38 deg


Least squares solution
----------------------
State vector (ECI, epoch of date):
 X =   3412425.53 +/- 71.28 m
 Y =  -2032495.92 +/- 55.91 m
 Z =   5093669.79 +/- 43.85 m
 Vx =     5274.43 +/- 189.08 m/s
 Vy =   -14718.92 +/- 113.12 m/s
 Vz =    20208.15 +/- 121.11 m/s

State vector covariance matrix (X, Y, Z, Vx, Vy, Vz):
+5.263494e+03, +5.154368e+02, +2.686968e+03, +1.157070e+04, +3.861518e+03, +3.774244e+03
+5.154368e+02, +3.341449e+03, +1.659290e+02, +4.654598e+02, +6.463079e+03, +5.269394e+03
+2.686968e+03, +1.659290e+02, +2.041151e+03, +6.721612e+03, +2.334264e+03, +2.176634e+03
+1.157070e+04, +4.654598e+02, +6.721612e+03, +3.703331e+04, +1.029264e+04, +9.441858e+03
+3.861518e+03, +6.463079e+03, +2.334264e+03, +1.029264e+04, +1.603802e+04, +1.326495e+04
+3.774244e+03, +5.269394e+03, +2.176634e+03, +9.441858e+03, +1.326495e+04, +1.106202e+04

Timing offsets (from input data):
    UK002F: -0.000514 s
    UK002K: -0.000395 s
    UK0032: 0.000000 s

Reference point on the trajectory:
  Time: 2021-08-13 00:24:44.571509 UTC
  Lon     = ++1.368573 +/- 0.0009 deg
  Lat     = +52.237912 +/- 0.0003 deg
  Lat geo = +52.054165 +/- 0.0003 deg
  Ht      =   94333.28 +/- 69.50 m

  JD dynamic   = 2459439.517983281519 
  LST apparent = 329.2212870233 deg
Radiant (apparent in ECI which includes Earth's rotation, epoch of date):
  R.A.      = 289.71481 +/- 0.7259 deg
  Dec       = +52.27023 +/- 0.3147 deg
  Azimuth   = 285.92553 +/- 0.6855 deg
  Elevation = +66.11942 +/- 0.4628 deg
  Vavg      =  24.58028 +/- 0.0223 km/s
  Vinit     =  25.55065 +/- 0.0444 km/s
Radiant (apparent ground-fixed, epoch of date):
  R.A.      = 290.54341 +/- 0.7259 deg
  Dec       = +52.59556 +/- 0.3147 deg
  Azimuth   = 286.37791 +/- 0.6855 deg
  Elevation = +66.69237 +/- 0.4628 deg
  Vavg      =  24.46893 +/- 0.0223 km/s
  Vinit     =  25.43930 +/- 0.0444 km/s
Radiant (geocentric, J2000):
  R.A.   = 287.59661 +/- 0.7621 deg
  Dec    = +51.88062 +/- 0.3351 deg
  Vg     =  23.00909 +/- 0.0494 km/s
  Vinf   =  25.55065 +/- 0.0444 km/s
  Zc     =  23.93161 +/- 0.4626 deg
  Zg     =  25.20265 +/- 0.4932 deg
Radiant (ecliptic geocentric, J2000):
  Lg     = 309.43042 +/- 1.7147 deg
  Bg     = +72.91305 +/- 0.2985 deg
  Vh     =  38.37104 +/- 0.1193 km/s
Radiant (ecliptic heliocentric, J2000):
  Lh     = 242.97944 +/- 0.2623 deg
  Bh     = +34.97298 +/- 0.2134 deg
  Vh_x   =  14.28446 +/- 0.1813 km/s
  Vh_y   =  28.00999 +/- 0.1429 km/s
  Vh_z   = -21.99390 +/- 0.0512 km/s
Orbit:
  La Sun = 140.204999 +/- 0.0000 deg
  a      =   3.182498 +/- 0.1166 AU
  e      =   0.694401 +/- 0.0099
  i      =  35.649677 +/- 0.2270 deg
  peri   = 205.560957 +/- 0.5977 deg
  node   = 140.210815 +/- 0.0000 deg
  Pi     = 345.771772 +/- 0.5976 deg
  q      =   0.972570 +/- 0.0016 AU
  f      = 334.432953 +/- 0.5976 deg
  M      = 356.589078 +/- 0.2174 deg
  Q      =   5.392426 +/- 0.2323 AU
  n      =   0.173601 +/- 0.0084 deg/day
  T      =   5.677443 +/- 0.3204 years
  Last perihelion JD = 2457385.443884 (2015-12-28 22:39:11.550740) +/- 117.3827 days
  Tj     =   2.549797 +/- 0.0483
Shower association:
  IAU No.  =   12
  IAU code =  KCG

Orbit covariance matrix:
             e     ,     q (AU)   ,      Tp (JD) ,   node (rad) ,   peri (rad) ,    i (rad)
e   , +1.034382e-04, +8.357485e-06, -1.226084e+00, +7.657889e-09, -6.680918e-05, -4.132799e-05
q   , +8.357485e-06, +2.820563e-06, -1.073427e-01, +6.869442e-10, -1.777561e-05, -3.707188e-06
Tp  , -1.226084e+00, -1.073427e-01, +1.459596e+04, -9.114707e-05, +8.397896e-01, +4.917628e-01
node, +7.657889e-09, +6.869442e-10, -9.114707e-05, +5.716540e-13, -5.340655e-09, -3.084674e-09
peri, -6.680918e-05, -1.777561e-05, +8.397896e-01, -5.340655e-09, +1.145699e-04, +2.882125e-05
i   , -4.132799e-05, -3.707188e-06, +4.917628e-01, -3.084674e-09, +2.882125e-05, +1.664569e-05

Jacchia fit on lag = -|a1|*exp(|a2|*t):
 a1 = 0.274307
 a2 = 14.804485

Mean time residuals from time vs. length:
  Station with reference time: UK0032
  Avg. res. = 1.209e-06 s
  Stddev    = 1.10e-03 s

Begin point on the trajectory:
  Lon =     1.368807 +/- 0.0009 deg
  Lat =    52.237871 +/- 0.0003 deg
  Ht  = 94295.16 +/- 47.70 m
End point on the trajectory:
  Lon =     1.437846 +/- 0.0006 deg
  Lat =    52.225369 +/- 0.0003 deg
  Ht  = 82715.87 +/- 30.77 m

Stations
--------
        ID, Ignored, Lon +E (deg), Lat +N (deg),  Ht (m), Jacchia a1, Jacchia a2,  Beg Ht (m),  End Ht (m), +/- Obs ang (deg), +/- V (m), +/- H (m), Persp. angle (deg), Weight, FOV Beg, FOV End, Comment
    UK002F,   False,    -1.306160,    51.883100,   80.00,   0.248105,  14.769235,    92010.05,    83880.51,          0.017021,     57.96,     23.54,              85.49, 0.9938,    True,    True, {"ff_name": "FF_UK002F_20210813_002441_588_0350464.fits"}
    UK002K,   False,    -0.382860,    53.537770,   34.00,   0.005426,  25.332439,    89484.51,    84887.50,          0.027464,     97.24,     24.59,              83.43, 0.9869,    True,    True, {"ff_name": "FF_UK002K_20210813_002440_640_0373248.fits"}
    UK0032,   False,    -0.023645,    52.984073,    6.00,   0.307443,  14.584013,    94295.16,    82715.87,          0.021727,     56.67,     17.30,              75.72, 0.9391,    True,    True, {"ff_name": "FF_UK0032_20210813_002436_867_0379136.fits"}

Points
------
 No, Station ID,  Ignore,  Time (s),                   JD,     meas1,     meas2, Azim +E of due N (deg), Alt (deg), Azim line (deg), Alt line (deg), RA obs (deg), Dec obs (deg), RA line (deg), Dec line (deg),       X (m),       Y (m),       Z (m), Latitude (deg), Longitude (deg), Height (m),  Range (m), Length (m), State vect dist (m),  Lag (m), Vel (m/s), Vel prev avg (m/s), H res (m), V res (m), Ang res (asec), AppMag, AbsMag
  0,     UK002F,       0,  0.094685, 2459439.517183525488,  50.09960,  27.30095,               76.95312,  24.98920,        76.94025,       24.98702,     50.09960,     +27.30095,      50.11093,      +27.30724,  3411901.03, -2031032.24,  5091660.26,      52.235411,       +1.382490,   92010.05,  210947.57,       0.00,             2540.80,   151.23,      0.00,           24346.74,    -16.44,    -40.49,          42.73,  +5.14,  +3.52
  1,     UK002F,       0,  0.134873, 2459439.517183990683,  50.26146,  27.12849,               76.96477,  24.76481,        76.98493,       24.76823,     50.26146,     +27.12849,      50.24388,      +27.11864,  3411730.20, -2030555.51,  5091005.73,      52.234595,       +1.386973,   91253.36,  210866.34,     827.56,             3368.36,   -48.04,  20592.21,           24346.74,     25.78,     63.48,          67.02,  +3.91,  +2.29
  2,     UK002F,       0,  0.175065, 2459439.517184455879,  50.37275,  26.88691,               77.06373,  24.51965,        77.03649,       24.51504,     50.37275,     +26.88691,      50.39709,      +26.90022,  3411532.85, -2030004.79,  5090249.62,      52.233653,       +1.392179,   90379.23,  210778.06,    1783.57,             4324.37,  -118.96,  23786.06,           24346.74,    -34.90,    -85.94,          90.77,  +4.23,  +2.61
  3,     UK002F,       0,  0.215329, 2459439.517184922006,  50.58859,  26.63776,               77.09170,  24.20570,        77.09903,       24.20694,     50.58859,     +26.63776,      50.58263,      +26.63418,  3411293.16, -2029335.90,  5089331.28,      52.232507,       +1.398539,   89317.59,  210678.75,    2944.69,             5485.49,    13.39,  28837.72,           24346.74,      9.41,     23.17,          24.48,  +2.67,  +1.05
  4,     UK002F,       0,  0.255541, 2459439.517185387202,  50.73321,  26.40362,               77.15927,  23.94539,        77.15208,       23.94417,     50.73321,     +26.40362,      50.74024,      +26.40714,  3411088.77, -2028765.53,  5088548.20,      52.231530,       +1.403939,   88412.31,  210597.54,    3934.80,             6475.60,   -23.95,  24622.20,           24832.69,     -9.25,    -22.77,          24.07,  +2.59,  +0.97
  5,     UK002F,       0,  0.295773, 2459439.517185852863,  50.91486,  26.17203,               77.19726,  23.66441,        77.20797,       23.66622,     50.91486,     +26.17203,      50.90624,      +26.16680,  3410872.81, -2028162.87,  5087720.78,      52.230497,       +1.409656,   87455.78,  210517.29,    4980.97,             7521.77,    -5.73,  26003.47,           25138.82,     13.79,     33.96,          35.91,  +2.54,  +0.92
  6,     UK002F,       0,  0.335985, 2459439.517186318524,  51.04643,  25.91581,               77.28881,  23.39501,        77.26314,       23.39066,     51.04643,     +25.91581,      51.07014,      +25.92836,  3410658.87, -2027565.85,  5086901.11,      52.229473,       +1.415319,   86508.23,  210442.74,    6017.34,             8558.14,     3.19,  25772.61,           25316.01,    -33.11,    -81.53,          86.25,  +2.01,  +0.39
  7,     UK002F,       0,  0.376193, 2459439.517186783720,  51.19880,  25.69896,               77.33572,  23.14207,        77.31343,       23.13829,     51.19880,     +25.69896,      51.21969,      +25.70985,  3410462.99, -2027019.22,  5086150.63,      52.228535,       +1.420491,   85640.67,  210378.03,    6966.23,             9507.02,   -75.26,  23599.44,           25246.83,    -28.79,    -70.88,          75.01,  +2.11,  +0.49
  8,     UK002F,       0,  0.416401, 2459439.517187248915,  51.34834,  25.47352,               77.39021,  22.88419,        77.36474,       22.87988,     51.34834,     +25.47352,      51.37223,      +25.48597,  3410262.58, -2026459.94,  5085382.77,      52.227575,       +1.425788,   84753.02,  210316.43,    7937.09,            10477.89,  -131.74,  24146.04,           25141.19,    -32.96,    -81.15,          85.90,  +2.62,  +1.01
  9,     UK002F,       0,  0.456613, 2459439.517187714577,  51.51782,  25.26434,               77.41767,  22.62618,        77.41500,       22.62573,     51.51782,     +25.26434,      51.52170,      +25.26565,  3410065.58, -2025910.20,  5084628.01,      52.226630,       +1.430993,   83880.51,  210260.00,    8891.39,            11432.19,  -204.88,  23731.73,           25010.54,     -3.46,     -8.51,           9.01,  +2.77,  +1.16
  0,     UK002K,       0,  0.211989, 2459439.517185006756,   3.65144,  -4.62270,              139.74456,  24.41280,       139.75966,       24.40947,      3.65144,      -4.62270,       3.64053,       -4.63106,  3411330.85, -2029441.07,  5089475.68,      52.232688,       +1.397481,   89484.51,  209636.36,       0.00,             5302.92,   -83.85,      0.00,           26000.29,     12.69,     50.18,          50.92,  +1.81,  +0.20
  1,     UK002K,       0,  0.252261, 2459439.517185472883,   3.84887,  -4.87862,              139.65373,  24.10078,       139.67891,       24.09524,      3.84887,      -4.87862,       3.83044,       -4.89261,  3411084.79, -2028754.43,  5088532.96,      52.231511,       +1.404016,   88394.70,  209507.90,    1191.95,             6494.87,    79.13,  29597.57,           26000.29,     21.20,     83.84,          85.14,  +2.00,  +0.39
  2,     UK002K,       0,  0.292485, 2459439.517185938545,   3.97591,  -5.11324,              139.62517,  23.83549,       139.61358,       23.83804,      3.97591,      -5.11324,       3.98561,       -5.10679,  3410883.52, -2028192.75,  5087761.80,      52.230548,       +1.409333,   87503.21,  209406.56,    2166.98,             7469.90,    26.41,  24239.90,           26000.29,     -9.77,    -38.65,          39.26,  +1.99,  +0.39
  3,     UK002K,       0,  0.332713, 2459439.517186404206,   4.16115,  -5.31257,              139.52364,  23.58030,       139.54702,       23.57516,      4.16115,      -5.31257,       4.14435,       -5.32561,  3410678.03, -2027619.31,  5086974.51,      52.229565,       +1.414765,   86593.08,  209307.83,    3162.42,             8465.33,    -6.01,  24744.88,           26000.29,     19.74,     78.05,          79.34,  +1.35,  -0.25
  4,     UK002K,       0,  0.372933, 2459439.517186869401,   4.32639,  -5.51049,              139.44203,  23.33407,       139.48401,       23.32483,      4.32639,      -5.51049,       4.29550,       -5.53396,  3410482.52, -2027073.72,  5086225.45,      52.228628,       +1.419927,   85727.16,  209217.88,    4109.51,             9412.42,   -86.56,  23547.70,           25325.79,     35.50,    140.34,         142.71,  +1.61,  +0.01
  5,     UK002K,       0,  0.413141, 2459439.517187335063,   4.47312,  -5.71251,              139.38102,  23.09118,       139.42318,       23.08191,      4.47312,      -5.71251,       4.44221,       -5.73613,  3410292.94, -2026544.68,  5085499.12,      52.227720,       +1.424929,   84887.50,  209134.48,    5027.86,            10330.78,  -195.55,  22840.11,           24778.15,     35.69,    141.11,         143.55,  +1.82,  +0.22
  6,     UK002K,       1,  0.453301, 2459439.517187799793,   4.60307,  -5.85213,              139.31066,  22.91226,       139.37774,       22.89750,      4.60307,      -5.85213,       4.55318,       -5.88978,  3410148.99, -2026142.96,  5084947.58,      52.227030,       +1.428687,   84249.88,  209072.17,    5725.20,            11028.12,  -524.32,  17364.16,           23789.64,     56.87,    224.71,         228.68,  +6.13,  +4.53
  0,     UK0032,       0,  0.000000, 2459439.517182540614,   6.04374,   8.78109,              130.82102,  36.11242,       130.80493,       36.11485,      6.04374,      +8.78109,       6.05392,       +8.78924,  3412416.92, -2032471.90,  5093636.81,      52.237871,       +1.368807,   94295.16,  157841.91,       0.00,               41.69,    71.39,      0.00,           24498.99,    -10.64,    -34.84,          47.60,  +3.71,  +2.72
  1,     UK0032,       0,  0.040320, 2459439.517183007672,   6.26684,   8.46654,              130.75839,  35.73160,       130.72096,       35.73725,      6.26684,      +8.46654,       6.29127,       +8.48557,  3412189.75, -2031837.93,  5092766.42,      52.236788,       +1.374820,   93288.88,  157548.34,    1100.51,             1142.20,   141.70,  27294.31,           24498.99,    -24.81,    -81.26,         111.24,  +4.97,  +3.98
  2,     UK0032,       0,  0.080572, 2459439.517183473334,   6.47826,   8.26520,              130.64439,  35.45646,       130.65931,       35.45421,      6.47826,      +8.26520,       6.46840,       +8.25759,  3412019.74, -2031363.51,  5092115.06,      52.235977,       +1.379278,   92535.84,  157331.54,    1924.06,             1965.75,   -63.21,  20459.95,           24498.99,      9.91,     32.45,          44.48,  +2.76,  +1.78
  3,     UK0032,       0,  0.120884, 2459439.517183939926,   6.67364,   7.93035,              130.62348,  35.07014,       130.57688,       35.07718,      6.67364,      +7.93035,       6.70467,       +7.95420,  3411794.40, -2030734.67,  5091251.70,      52.234902,       +1.385244,   91537.72,  157052.56,    3015.67,             3057.36,    -1.60,  27079.05,           24498.99,    -31.04,   -101.69,         139.63,  +2.71,  +1.73
  4,     UK0032,       0,  0.161196, 2459439.517184406519,   6.92554,   7.66229,              130.50443,  34.71714,       130.49920,       34.71793,      6.92554,      +7.66229,       6.92934,       +7.66497,  3411580.38, -2030137.43,  5090431.74,      52.233880,       +1.390902,   90589.78,  156793.76,    4052.41,             4094.11,     5.14,  25717.95,           24866.48,     -3.49,    -11.43,          15.73,  +2.23,  +1.25
  5,     UK0032,       0,  0.201508, 2459439.517184873112,   7.15103,   7.37003,              130.42766,  34.35466,       130.42153,       34.35559,      7.15103,      +7.37003,       7.15561,       +7.37319,  3411365.27, -2029537.14,  5089607.57,      52.232852,       +1.396592,   89636.99,  156540.09,    5094.47,             5136.16,    17.20,  25849.81,           25111.98,     -4.10,    -13.43,          18.51,  +1.99,  +1.02
  6,     UK0032,       0,  0.241804, 2459439.517185339704,   7.35150,   7.07448,              130.37955,  34.00065,       130.34725,       34.00554,      7.35150,      +7.07448,       7.37381,       +7.09119,  3411158.09, -2028958.98,  5088813.80,      52.231862,       +1.402067,   88719.35,  156301.63,    6098.09,             6139.79,    -8.77,  24906.24,           25177.59,    -21.68,    -71.02,          97.99,  +1.66,  +0.69
  7,     UK0032,       0,  0.282120, 2459439.517185806297,   7.58588,   6.78162,              130.29418,  33.63340,       130.26960,       33.63712,      7.58588,      +6.78162,       7.60325,       +6.79438,  3410940.80, -2028352.60,  5087981.27,      52.230822,       +1.407820,   87756.92,  156058.36,    7150.72,             7192.41,    13.76,  26109.43,           25282.61,    -16.54,    -54.19,          74.88,  +1.74,  +0.77
  8,     UK0032,       0,  0.322424, 2459439.517186272424,   7.81126,   6.49605,              130.21462,  33.27668,       130.19499,       33.27964,      7.81126,      +6.49605,       7.82551,       +6.50628,  3410730.59, -2027765.98,  5087175.88,      52.229816,       +1.413380,   86825.87,  155829.13,    8169.04,             8210.73,     2.28,  25265.86,           25330.50,    -13.24,    -43.38,          60.03,  +1.40,  +0.44
  9,     UK0032,       0,  0.362712, 2459439.517186739016,   8.02763,   6.23559,              130.13098,  32.94626,       130.12633,       32.94696,      8.02763,      +6.23559,       8.03194,       +6.23802,  3410535.45, -2027221.42,  5086428.24,      52.228882,       +1.418531,   85961.58,  155621.42,    9114.33,             9156.02,   -81.81,  23463.37,           25253.07,     -3.15,    -10.30,          14.28,  +1.42,  +0.46
 10,     UK0032,       0,  0.403004, 2459439.517187205143,   8.22489,   5.94363,              130.08501,  32.59666,       130.05539,       32.60114,      8.22489,      +5.94363,       8.24637,       +5.95916,  3410333.21, -2026657.05,  5085653.39,      52.227913,       +1.423877,   85065.85,  155412.13,   10094.03,            10135.73,  -131.59,  24315.11,           25168.21,    -20.08,    -65.77,          91.27,  +1.53,  +0.57
 11,     UK0032,       0,  0.443292, 2459439.517187671736,   8.45176,   5.69607,              129.98394,  32.27270,       129.98855,       32.27200,      8.45176,      +5.69607,       8.45011,       +5.69364,  3410141.19, -2026121.19,  5084917.69,      52.226993,       +1.428946,   84215.38,  155218.44,   11024.22,            11065.91,  -230.79,  23088.48,           25039.30,      3.13,     10.26,          14.25,  +1.61,  +0.66
 12,     UK0032,       0,  0.483576, 2459439.517188137863,   8.65442,   5.42290,              129.92250,  31.93715,       129.92105,       31.93737,      8.65442,      +5.42290,       8.65707,       +5.42367,  3409946.49, -2025577.85,  5084171.72,      52.226059,       +1.434089,   83353.04,  155027.55,   11967.41,            12009.11,  -316.88,  23413.62,           24907.81,     -0.99,     -3.23,           4.50,  +2.53,  +1.58
 13,     UK0032,       0,  0.523776, 2459439.517188603058,   8.77527,   5.19897,              129.91924,  31.68294,       129.87225,       31.69005,      8.77527,      +5.19897,       8.80936,       +5.22380,  3409802.64, -2025176.42,  5083620.58,      52.225369,       +1.437846,   82715.87,  154888.08,   12664.26,            12705.95,  -647.16,  17334.50,           24609.39,    -32.04,   -105.00,         146.19,  +3.88,  +2.93

Notes
-----
- Points that have not been taken into consideration when computing the trajectory have '1' in the 'Ignore' column.
- The time already has time offsets applied to it.
- 'meas1' and 'meas2' are given input points.
- X, Y, Z are ECI (Earth-Centered Inertial) positions of projected lines of sight on the radiant line.
- Zc is the observed zenith distance of the entry angle, while the Zg is the entry zenith distance corrected for Earth's gravity.
- Latitude (deg) and Longitude (deg) are in WGS84 coordinates, while Height (m) is in the EGM96 datum. There values are coordinates of each point on the radiant line.
- Jacchia (1955) deceleration equation fit was done on the lag.
- Right ascension and declination in the table are given in the epoch of date for the corresponding JD, per every point.
- 'RA and Dec obs' are the right ascension and declination calculated from the observed values, while the 'RA and Dec line' are coordinates of the lines of sight projected on the fitted radiant line. The coordinates are in the epoch of date, and NOT J2000!. 'Azim and alt line' are thus corresponding azimuthal coordinates.
- 'Vel prev avg' is the average velocity including all previous points up to the given point. For the first 4 points this velocity is computed as the average velocity of those 4 points.