Orbital Analysis for matched events on 20210810_030127.314_UK

Summary for Event
-----------------
shower ID 7 PER
Lg 62.37° Bg 42.21° Vg 55.51km/s
mass 0.01461g, abs. mag 0.2
Path Details
------------
start -0.01° 50.35° 104.62km
end   -0.06° 50.32° 93.69km

Orbit Details
-------------
Semimajor axis 6.06A.U., eccentricity 0.84, inclination 105.48°, Period 14.94Y, LA Sun 137.43°, last Perihelion 2021-07-17

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: 2459436.626010589302
Time: 2021-08-10 03:01:27.355028 UTC


Plane intersections
-------------------
Intersection 1 - Stations: UK0001 and UK002C
 Convergence angle = 12.05670 deg
 R.A. =  45.47595  Dec = +59.55284 deg

Best intersection: Stations UK0001 and UK002C with Qconv = 12.06 deg


Least squares solution
----------------------
State vector (ECI, epoch of date):
 X =   4134346.83 +/- 196.53 m
 Y =    302195.90 +/- 213.75 m
 Z =   4969502.07 +/- 85.33 m
 Vx =    19436.73 +/- 5702.98 m/s
 Vy =    18894.40 +/- 5687.65 m/s
 Vz =    49691.25 +/- 13418.96 m/s

State vector covariance matrix (X, Y, Z, Vx, Vy, Vz):
+3.889211e+04, +4.185380e+04, +1.634832e+04, +2.969065e+05, +3.138880e+05, +3.205574e+05
+4.185380e+04, +4.595430e+04, +1.787865e+04, +3.312214e+05, +3.550641e+05, +3.775067e+05
+1.634832e+04, +1.787865e+04, +7.395653e+03, +9.870447e+04, +1.078915e+05, +7.294704e+04
+2.969065e+05, +3.312214e+05, +9.870447e+04, +2.881719e+07, +2.846682e+07, +6.795439e+07
+3.138880e+05, +3.550641e+05, +1.078915e+05, +2.846682e+07, +2.817837e+07, +6.687108e+07
+3.205574e+05, +3.775067e+05, +7.294704e+04, +6.795439e+07, +6.687108e+07, +1.655587e+08

Timing offsets (from input data):
    UK0001: 0.000000 s
    UK002B: 0.000000 s
    UK002C: 0.000577 s
    UK002D: 0.000000 s
    UK0038: 0.000000 s

Reference point on the trajectory:
  Time: 2021-08-10 03:01:27.355028 UTC
  Lon     = +-0.000834 +/- 0.0027 deg
  Lat     = +50.352469 +/- 0.0010 deg
  Lat geo = +50.166374 +/- 0.0010 deg
  Ht      =  105937.02 +/- 197.89 m

  JD dynamic   = 2459436.626811794471 
  LST apparent = 4.1805424918 deg
Radiant (apparent in ECI which includes Earth's rotation, epoch of date):
  R.A.      =  44.18940 +/- 0.3588 deg
  Dec       = +61.38723 +/- 1.2367 deg
  Azimuth   =  47.94938 +/- 2.9902 deg
  Elevation = +65.50443 +/- 0.1332 deg
  Vavg      =  54.71747 +/- 0.9440 km/s
  Vinit     =  56.60393 +/- 14.5898 km/s
Radiant (apparent ground-fixed, epoch of date):
  R.A.      =  44.67529 +/- 0.3588 deg
  Dec       = +61.21396 +/- 1.2367 deg
  Azimuth   =  48.43897 +/- 2.9902 deg
  Elevation = +65.29722 +/- 0.1332 deg
  Vavg      =  54.81126 +/- 0.9440 km/s
  Vinit     =  56.69772 +/- 14.5898 km/s
Radiant (geocentric, J2000):
  R.A.   =  44.26460 +/- 0.3479 deg
  Dec    = +61.33752 +/- 1.2489 deg
  Vg     =  55.50514 +/- 0.9537 km/s
  Vinf   =  56.60393 +/- 0.9359 km/s
  Zc     =  24.62058 +/- 0.1340 deg
  Zg     =  24.86567 +/- 0.1365 deg
Radiant (ecliptic geocentric, J2000):
  Lg     =  62.36914 +/- 0.5410 deg
  Bg     = +42.21418 +/- 1.1920 deg
  Vh     =  40.04948 +/- 0.2595 km/s
Radiant (ecliptic heliocentric, J2000):
  Lh     =  92.38228 +/- 3.6332 deg
  Bh     = +68.62714 +/- 1.6686 deg
  Vh_x   =   0.60669 +/- 1.0455 km/s
  Vh_y   = -14.58285 +/- 1.1311 km/s
  Vh_z   = -37.29522 +/- 0.2914 km/s
Orbit:
  La Sun = 137.430033 +/- nan deg
  a      =   6.064650 +/- 2.2949 AU
  e      =   0.844947 +/- 0.0221
  i      = 105.480609 +/- 2.2620 deg
  peri   = 147.342018 +/- 0.7820 deg
  node   = 137.430816 +/- 0.0001 deg
  Pi     = 284.772834 +/- 0.7819 deg
  q      =   0.940339 +/- 0.0027 AU
  f      =  32.654633 +/- 0.7820 deg
  M      =   1.544462 +/- 0.3029 deg
  Q      =  11.188961 +/- 4.5881 AU
  n      =   0.065993 +/- 0.0122 deg/day
  T      =  14.935139 +/- 11.7880 years
  Last perihelion JD = 2459413.223254 (2021-07-17 17:21:29.131826) +/- 0.6212 days
  Tj     =   0.549917 +/- 0.1636
Shower association:
  IAU No.  =    7
  IAU code =  PER

Orbit covariance matrix:
             e     ,     q (AU)   ,      Tp (JD) ,   node (rad) ,   peri (rad) ,    i (rad)
e   , +4.625401e-04, +4.001172e-05, +1.174263e-02, -4.359662e-08, +2.392468e-04, +6.881565e-04
q   , +4.001172e-05, +7.193924e-06, +1.554650e-03, -3.906741e-09, +3.563317e-05, +6.162842e-05
Tp  , +1.174263e-02, +1.554650e-03, +3.760614e-01, -1.128770e-06, +8.232497e-03, +1.781656e-02
node, -4.359662e-08, -3.906741e-09, -1.128770e-06, +6.038422e-12, -2.311259e-08, -9.660409e-08
peri, +2.392468e-04, +3.563317e-05, +8.232497e-03, -2.311259e-08, +1.835583e-04, +3.647305e-04
i   , +6.881565e-04, +6.162842e-05, +1.781656e-02, -9.660409e-08, +3.647305e-04, +1.546182e-03

Jacchia fit on lag = -|a1|*exp(|a2|*t):
 a1 = 0.000000
 a2 = 0.000000

Mean time residuals from time vs. length:
  Station with reference time: UK0001
  Avg. res. = 8.590e-06 s
  Stddev    = 2.93e-03 s

Begin point on the trajectory:
  Lon =    -0.007003 +/- 0.0023 deg
  Lat =    50.348908 +/- 0.0009 deg
  Ht  = 104617.96 +/- 162.90 m
End point on the trajectory:
  Lon =    -0.059098 +/- 0.0017 deg
  Lat =    50.319335 +/- 0.0009 deg
  Ht  = 93689.48 +/- 79.81 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
    UK0001,   False,    -1.778230,    50.857470,   24.00,   0.000000,   0.000000,   104617.96,    94273.75,          0.008618,      0.10,     25.37,              44.10, 1.0000,    True,    True, {"ff_name": "FF_UK0001_20210810_030118_247_0606720.fits"}
    UK002B,    True,    -1.367130,    50.815550,   22.00,   0.000000,   0.000000,   104308.59,    93056.87,          0.018206,       nan,       nan,              40.43, 0.0000,    True,    True, {"ff_name": "FF_UK002B_20210810_030119_451_0609792.fits"}
    UK002C,   False,    -1.801980,    51.351940,  130.00,   0.000000,   0.000000,   103392.70,    93689.48,          0.007916,      5.52,     26.46,              55.81, 1.0000,    True,    True, {"ff_name": "FF_UK002C_20210810_030121_243_0603392.fits"}
    UK002D,    True,    -1.801980,    51.351940,  129.00,   0.000000,   0.000000,   106374.26,    94947.72,          0.045732,       nan,       nan,              55.81, 0.0000,    True,    True, {"ff_name": "FF_UK002D_20210810_030117_966_0603392.fits"}
    UK0038,    True,    -2.379250,    51.361350,  169.00,   0.000000,   0.000000,   104967.61,    94382.06,          0.037897,       nan,       nan,              56.52, 0.0000,    True,    True, {"ff_name": "FF_UK0038_20210810_030119_807_0599552.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,     UK0001,       1,  0.000000, 2459436.626010589302,  52.14601,  15.24896,              113.32778,  36.69470,       113.35922,       36.71024,     52.14601,     +15.24896,      52.11545,      +15.24626,  4134369.21,   302217.66,  4969559.30,      50.352629,       -0.000389,  105996.34,  174747.86,       0.00,               65.18,   845.56,      0.00,           52803.01,    -90.32,      0.40,         106.61,  +5.84,  +4.63
  1,     UK0001,       0,  0.040104, 2459436.626011053566,  52.14567,  14.88606,              113.59901,  36.40449,       113.59783,       36.40390,     52.14567,     +14.88606,      52.14699,      +14.88617,  4133849.08,   301712.04,  4968229.55,      50.348908,       -0.007003,  104617.96,  173699.77,    1514.73,             1449.55,   -40.12,  37770.08,           52803.01,      3.38,     -0.01,           4.01,  +2.12,  +0.92
  2,     UK0001,       0,  0.080324, 2459436.626011518762,  52.21012,  14.27746,              113.98684,  35.87893,       113.99570,       35.88330,     52.21012,     +14.27746,      52.20181,      +14.27669,  4132983.45,   300870.56,  4966016.50,      50.342711,       -0.017904,  102324.08,  171976.82,    4035.65,             3970.47,   204.19,  62678.28,           52803.01,    -25.23,      0.10,          30.26,  +1.24,  +0.06
  3,     UK0001,       0,  0.120512, 2459436.626011983957,  52.25888,  13.73698,              114.33480,  35.41589,       114.34456,       35.42069,     52.25888,     +13.73698,      52.24986,      +13.73614,  4132229.74,   300137.89,  4964089.60,      50.337312,       -0.027421,  100326.94,  170491.78,    6230.60,             6165.42,   124.34,  54617.09,           52803.01,    -27.64,      0.11,          33.45,  +0.82,  -0.34
  4,     UK0001,       0,  0.160696, 2459436.626012449153,  52.29139,  13.16392,              114.71756,  34.93474,       114.70891,       34.93050,     52.29139,     +13.16392,      52.30052,      +13.16466,  4131446.94,   299376.93,  4962088.32,      50.331699,       -0.037302,   98252.81,  168966.22,    8510.29,             8445.11,   129.46,  56731.23,           54099.32,     24.38,     -0.09,          29.76,  +1.07,  -0.07
  5,     UK0001,       0,  0.200892, 2459436.626012914348,  52.35649,  12.63511,              115.03301,  34.46954,       115.04347,       34.47467,     52.35649,     +12.63511,      52.34709,      +12.63421,  4130732.62,   298682.54,  4960262.12,      50.326574,       -0.046337,   96360.25,  167588.37,   10590.54,            10525.35,   -65.55,  51752.61,           54134.20,    -29.32,      0.11,          36.09,  +0.76,  -0.36
  6,     UK0001,       0,  0.241096, 2459436.626013379544,  52.40947,  12.04012,              115.40285,  33.95656,       115.41416,       33.96209,     52.40947,     +12.04012,      52.39938,      +12.03915,  4129945.06,   297916.95,  4958248.67,      50.320919,       -0.056285,   94273.75,  166087.21,   12884.08,            12818.90,   -47.71,  57047.68,           54458.99,    -31.57,      0.12,          39.20,  +1.34,  +0.24
  0,     UK002B,       1,  0.036240, 2459436.626011008862,  45.78186,  18.14792,              117.84772,  42.90256,       117.86111,       42.90940,     45.78186,     +18.14792,      45.76943,      +18.14768,  4133732.34,   301598.56,  4967931.10,      50.348073,       -0.008434,  104308.59,  151772.88,       0.00,             1789.52,   518.58,      0.00,           51700.48,    -31.35,     -4.52,          43.04,  +2.13,  +1.22
  1,     UK002B,       1,  0.076412, 2459436.626011473592,  45.80302,  17.63778,              118.23222,  42.47739,       118.26098,       42.49203,     45.80302,     +17.63778,      45.77631,      +17.63728,  4133059.82,   300944.81,  4966211.76,      50.343258,       -0.016940,  102526.47,  150344.74,    1958.52,             3748.04,   203.21,  48753.42,           51700.48,    -66.92,     -9.64,          92.76,  +1.01,  +0.12
  2,     UK002B,       1,  0.116584, 2459436.626011938788,  45.79837,  17.06239,              118.68942,  42.01205,       118.70482,       42.01986,     45.79837,     +17.06239,      45.78438,      +17.06212,  4132317.05,   300222.75,  4964312.80,      50.337937,       -0.026321,  100558.26,  148782.34,    4121.65,             5911.17,    92.45,  53846.70,           51700.48,    -35.59,     -5.14,          49.85,  +1.00,  +0.14
  3,     UK002B,       1,  0.156744, 2459436.626012403518,  45.78504,  16.49761,              119.14093,  41.55840,       119.13412,       41.55495,     45.78504,     +16.49761,      45.79211,      +16.49773,  4131602.91,   299528.54,  4962487.05,      50.332818,       -0.035350,   98666.05,  147294.31,    6201.38,             7990.90,  -101.04,  51786.01,           51700.48,     15.66,      2.27,          22.15,  +0.45,  -0.39
  4,     UK002B,       1,  0.196936, 2459436.626012868714,  45.78755,  15.88430,              119.60641,  41.05452,       119.59334,       41.04794,     45.78755,     +15.88430,      45.80069,      +15.88453,  4130843.02,   298789.86,  4960544.36,      50.327366,       -0.044950,   96652.74,  145727.47,    8414.33,            10203.85,  -163.11,  55059.40,           52452.76,     29.84,      4.33,          42.67,  +0.20,  -0.62
  5,     UK002B,       1,  0.237140, 2459436.626013333909,  45.77492,  15.19402,              120.13797,  40.49363,       120.10121,       40.47516,     45.77492,     +15.19402,      45.81063,      +15.19464,  4130007.19,   297977.35,  4958407.50,      50.321365,       -0.055497,   94438.34,  144024.52,   10848.45,            12637.97,    -4.69,  60544.36,           53824.55,     83.35,     12.16,         120.63,  +0.64,  -0.15
  6,     UK002B,       1,  0.277304, 2459436.626013798639,  45.80973,  14.75617,              120.42585,  40.11331,       120.42090,       40.11083,     45.80973,     +14.75617,      45.81558,      +14.75625,  4129485.73,   297470.44,  4957074.37,      50.317619,       -0.062142,   93056.87,  142969.92,   12367.04,            14156.56,  -759.55,  37809.62,           52598.95,     11.18,      1.62,          16.30,  +5.13,  +4.35
  0,     UK002C,       0,  0.057462, 2459436.626011247747,  43.03591,   2.54172,              130.91975,  30.52789,       130.92495,       30.53036,     43.03591,      +2.54172,      43.03104,       +2.54178,  4133386.72,   301262.58,  4967047.48,      50.345599,       -0.012805,  103392.70,  198818.83,       0.00,             2796.05,   323.87,      0.00,           55135.38,    -17.36,     -3.62,          18.40,  +2.00,  +0.51
  1,     UK002C,       0,  0.097762, 2459436.626011714339,  43.02774,   2.07123,              131.18501,  30.11680,       131.19009,       30.11920,     43.02774,      +2.07123,      43.02313,       +2.07129,  4132734.74,   300628.79,  4965380.66,      50.340930,       -0.021059,  101665.05,  197835.75,    1898.70,             4694.75,   -58.56,  47114.14,           55135.38,    -16.95,     -3.53,          18.05,  +1.53,  +0.05
  2,     UK002C,       0,  0.138126, 2459436.626012181398,  43.00060,   1.48617,              131.52905,  29.61279,       131.51621,       29.60672,     43.00060,      +1.48617,      43.01389,       +1.48602,  4131932.61,   299849.04,  4963329.95,      50.335182,       -0.031178,   99539.62,  196646.51,    4234.69,             7030.74,    -7.34,  57873.06,           55135.38,     42.72,      8.92,          45.77,  +0.96,  -0.51
  3,     UK002C,       0,  0.178530, 2459436.626012648921,  43.00763,   0.87646,              131.84820,  29.07021,       131.85225,       29.07212,     43.00763,      +0.87646,      43.00436,       +0.87651,  4131107.33,   299046.79,  4961220.08,      50.329263,       -0.041589,   97353.01,  195444.85,    6638.07,             9434.13,   109.02,  59483.88,           55135.38,    -13.42,     -2.80,          14.47,  +1.01,  -0.45
  4,     UK002C,       0,  0.218886, 2459436.626013115980,  42.99073,   0.31658,              132.16188,  28.58213,       132.15816,       28.58037,     42.99073,      +0.31658,      42.99536,       +0.31654,  4130357.91,   298318.28,  4959304.14,      50.323884,       -0.051063,   95367.50,  194372.33,    8820.55,            11616.60,     7.19,  54080.50,           55450.77,     12.33,      2.57,          13.37,  +2.34,  +0.90
  5,     UK002C,       0,  0.259190, 2459436.626013582572,  42.97465,  -0.16139,              132.42905,  28.16564,       132.41751,       28.16020,     42.97465,      -0.16139,      42.98727,       -0.16153,  4129724.52,   297702.57,  4957684.84,      50.319335,       -0.059098,   93689.48,  193479.31,   10665.10,            13461.16,  -429.62,  45766.12,           54159.37,     38.14,      7.97,          41.54,  +3.73,  +2.30
  0,     UK002D,       1,  0.023280, 2459436.626010858919,  43.04716,   3.34301,              130.46554,  31.22805,       130.47078,       31.23054,     43.04716,      +3.34301,      43.04212,       +3.34306,  4134511.82,   302356.29,  4969923.88,      50.353648,       +0.001281,  106374.26,  200540.12,       0.00,              480.49,   -56.88,      0.00,           63436.15,    -17.58,     -3.66,          18.47,  +4.92,  +3.41
  1,     UK002D,       1,  0.064012, 2459436.626011330169,  43.07046,   2.50527,              130.90443,  30.47946,       130.94575,       30.49905,     43.07046,      +2.50527,      43.03005,       +2.50572,  4133336.20,   301213.47,  4966918.32,      50.345237,       -0.013462,  103258.82,  198741.92,    3423.68,             2943.19,   100.23,  84053.72,           63436.15,   -138.03,    -28.65,         146.31,  +1.56,  +0.07
  2,     UK002D,       1,  0.104476, 2459436.626011798624,  43.09311,   1.97564,              131.17035,  30.00171,       131.24336,       30.03625,     43.09311,      +1.97564,      43.02147,       +1.97640,  4132603.73,   300501.44,  4965045.72,      50.339992,       -0.022714,  101317.90,  197640.48,    5556.78,             5076.29,   -57.09,  52715.99,           63436.15,   -243.34,    -50.37,         259.34,  +1.47,  -0.01
  3,     UK002D,       1,  0.144976, 2459436.626012267079,  43.04548,   1.39711,              131.53135,  29.51309,       131.56547,       29.52921,     43.04548,      +1.39711,      43.01229,       +1.39748,  4131811.78,   299731.58,  4963021.05,      50.334316,       -0.032709,   99219.47,  196469.40,    7863.11,             7382.62,   -43.22,  56946.46,           63436.15,   -113.42,    -23.57,         121.62,  +0.65,  -0.82
  4,     UK002D,       1,  0.185520, 2459436.626012736466,  43.04259,   0.77391,              131.86737,  28.96317,       131.90840,       28.98253,     43.04259,      +0.77391,      43.00258,       +0.77436,  4130969.70,   298913.00,  4960868.22,      50.328276,       -0.043330,   96988.36,  195246.94,   10315.43,             9834.94,   114.15,  60485.37,           61839.80,   -136.06,    -28.27,         146.80,  +0.64,  -0.81
  5,     UK002D,       1,  0.226024, 2459436.626013205387,  43.04606,   0.19700,              132.16907,  28.45052,       132.22284,       28.47585,     43.04606,      +0.19700,      42.99337,       +0.19759,  4130199.46,   298164.25,  4958899.05,      50.322746,       -0.053063,   94947.72,  194148.59,   12558.53,            12078.04,    64.56,  55379.80,           60461.50,   -177.95,    -36.93,         193.09,  +0.95,  -0.49
  0,     UK0038,       1,  0.031739, 2459436.626010956708,  50.59230,   2.42269,              122.98023,  26.36063,       123.02300,       26.38105,     50.59230,      +2.42269,      50.54906,       +2.41999,  4133981.03,   301840.31,  4968566.88,      50.349852,       -0.005333,  104967.61,  228572.52,       0.00,             1065.29,    49.14,      0.00,           57038.57,   -172.99,     -8.97,         156.31,  +3.70,  +1.90
  1,     UK0038,       1,  0.072159, 2459436.626011424698,  50.62781,   1.92983,              123.23392,  25.92211,       123.28355,       25.94577,     50.62781,      +1.92983,      50.57766,       +1.92669,  4133196.42,   301077.59,  4966560.96,      50.344236,       -0.015229,  102888.42,  227400.90,    2284.96,             3350.26,    46.17,  56530.52,           57038.57,   -200.22,    -10.37,         181.86,  +1.80,  +0.02
  2,     UK0038,       1,  0.112595, 2459436.626011892688,  50.63327,   1.41352,              123.52764,  25.47876,       123.55333,       25.49100,     50.63327,      +1.41352,      50.60756,       +1.41190,  4132386.09,   300289.87,  4964489.32,      50.338432,       -0.025448,  100741.22,  226209.11,    4644.80,             5710.09,   117.16,  58359.67,           57038.57,   -103.41,     -5.41,          94.42,  +1.73,  -0.04
  3,     UK0038,       1,  0.153019, 2459436.626012360211,  50.67337,   0.91726,              123.77504,  25.03399,       123.81194,       25.05154,     50.67337,      +0.91726,      50.63632,       +0.91491,  4131611.76,   299537.14,  4962509.68,      50.332881,       -0.035224,   98689.50,  225087.14,    6899.83,             7965.12,    84.04,  55784.50,           57038.57,   -148.13,     -7.72,         135.93,  +1.40,  -0.36
  4,     UK0038,       1,  0.193443, 2459436.626012828201,  50.70146,   0.41941,              124.03284,  24.59366,       124.06914,       24.61092,     50.70146,      +0.41941,      50.66510,       +0.41710,  4130843.73,   298790.55,  4960546.18,      50.327372,       -0.044926,   96654.63,  223991.19,    9136.48,            10201.77,    32.53,  55329.80,           56615.49,   -145.38,     -7.58,         134.06,  +1.42,  -0.33
  5,     UK0038,       1,  0.233915, 2459436.626013296656,  50.72285,  -0.14303,              124.33163,  24.10102,       124.35696,       24.11306,     50.72285,      -0.14303,      50.69781,       -0.14464,  4129985.94,   297956.69,  4958353.18,      50.321213,       -0.055747,   94382.06,  222788.43,   11634.56,            12699.85,   239.74,  61723.65,           57225.19,   -101.23,     -5.31,          93.85,  +1.82,  +0.08

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.