Observation record.Marcs.2020-12-15T10-25-00

Station-sol Marcs
Propriétaire N5FXH

Waterfall
ComparaisonDoppler
PostProcessing

Résumé de l'événement

satellite ESEO
date 2020-12-15
time 10:25:00
duration 750
freq 4.37e+08
culm 66.7809

Waterfall

Le graphique en bas à gauche donne le waterfall (temps en abscisse, fréquence en ordonnée). Le graphique en haut donne la puissance du signal intégrée en fréquence en fonction du temps. En bas à droite moyenne des spectres sur tous les temps de mesure (fréquence en ordonnée).

L'étendue en temps de la mesure est donnée dans la partie en haut à droite (minimum_time, maximum_time). L'étendue en fréquence déterminée par le nombre de points utilisés par la transformée de Fourier est donnée par fmin et fmax. Les unités utilisées pour la puissance (ou l'énergie reçue dans chaque intervalle de temps) n'ont pas pu être déterminées.

transitfile record.Marcs.2020-12-15T10-25-00.transit

Données complémentaires de la capture

Le début du transit est marqué par un cercle et la fin du transit par un disque.

• paramètres prévus
  filename record.Marcs.2020-12-15T10-25-00
  satellite ESEO
  date 2020-12-15
  time 10:25:00
  samp 250000
  duration 750
  freq 4.37e+08
  culm 66.7809
• paramètres réalisés
  recfile record.Marcs.2020-12-15T10-25-00.dat
  start 2020-12-15T10:25:00
  end 2020-12-15T10:37:47
  freq 4.37e+08
  gain 48
  ns 750
  samp 250000
  nsamp 187500000

Fit Gaussien

Lorsque l'intensité du signal en fonction du temps suit une loi approximativement Gaussienne, cet outil doit en capturer approximativement les paramètres par ajustement non-linéaire. L'ajustement est réalisé à l'aide de la librairie NLOPT2. Le comportement est indéfini si la loi est quelconque.

abscisses: nombre de giga-samples
ordonnées: sum_20000(I²+Q²)/1e6

• Resultats du fit
  t0 -86564400 [ -346.258 s]
  a 86719900
  sigma 51839100
  y0 6.69112e+07

calpower-stats

• Autres statistiques (de la valeur I²+Q²)
  moyenne 273.294
  max 710.886
  moyenne.debut.fin 283.839
  hauteur.signal 427.047 [ 26.3048 dB ] (max - moyenne.debut.fin)
  longueur.totale 750
  integrale.signal -7908.61 (somme - moyenne.debut.fin*longueur.totale)

Comparaison Doppler calculé et mesuré

Abscisses: fréquence en Hz
Ordonnées: temps en secondes

sumY2 0
sumDy2 0
dfmin -1180.35 sumDy2 0
dtmin -23.6071 sumDy2 0

* Kepler element data for ESEO

name ‘ESEO’
satellite_number 43792
central_object EARTH
ephemeris_type UnknownEphemerisType
epoch_year 20
epoch_day 348.4739894

• Kepler elements
  epoch_julday 2459196.9739894
  Time jd 2459196.97399 < 2020-12-13 11:22:32.0684 UTC >
  inclination 97.6863 deg [97 41'11"]
  right_ascension_of_ascending_node 57.1724 deg [3:48:41]
  major_radius 6959.25 km
  eccentricity 0.0012135
  periast_argument 318.614 deg [318 36'50"]
  mean_anomaly 41.4161 deg [41 24'58"]

• Supplemental data
  cc 1.99757594159
  ra 6.96769e+06 [596685]
  rp 6.9508e+06 [579795]
  va 7578.59
  vp 7560.22
  axb 6967.69 x 6967.69
  mammmdt 45.3082
  bstar 0.6264
  mean_motion_1st_deriv 5.69e-06
  mean_motion_2nd_deriv 0
  mean_motion 14.9566 rev/day 0.0668601 day/rev
  periapsis_distance 6950.8 km
  apoapsis_distance 6967.69 km
  periapsis_mean_height 579.795 km
  apoapsis_mean_height 596.685 km
  rev_number_at_epoch 11046
  tle_age 1.00653 day

* TLE

ESEO
1 43792U 18099AL 20348.47398940 .00000569 00000-0 56264-4 0 9990
2 43792 97.6863 57.1724 0012135 318.6140 41.4161 14.95660895110469

Analyse spectre

median 24.0637
noise_level_db 24.1627
min 12.9812
max 37.5693
freq_center -15262.3
trig_level_db 10
nbin_rescaling 29.9957
freq_center_trig -66570.9
signal_range_dB 13.4066
theo_range_dB 48.1648 [ 8 bits ]

Post-traitement

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nombre de decodages: 0

Credits

Decodage gr-satellites v3.6.0 (Daniel Estevez)

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