Observation record.Satnogs-UHF.2021-04-13T10-38-00

Ground-station Satnogs-UHF
Owner N5CNB

Waterfall
DopplerComparaison
PostProcessing

Résumé de l'événement

satellite FALCONSAT-3
date 2021-04-13
time 10:38:00
duration 400
freq 4.35103e+08
culm 39.3952

Waterfall

The graph at the bottom left gives the waterfall (time on the abscissa, frequency on the ordinate). The graph at the top gives the integrated signal strength in frequency as a function of time. At the bottom right, the average of the spectra over all the measurement times (frequency on the ordinate).

The time range of the measurement is given in the top right part (minimum_time, maximum_time). The frequency range determined by the number of points used by the Fourier transform is given by fmin and fmax. The units used for power (or the energy received in each time slot) could not be determined.

transitfile record.Satnogs-UHF.2021-04-13T10-38-00.transit

Additional capture data

The beginning of the transit is marked by a circle and the end of the transit by a disc.

• paramètres prévus
  filename record.Satnogs-UHF.2021-04-13T10-38-00
  satellite FALCONSAT-3
  date 2021-04-13
  time 10:38:00
  samp 250000
  duration 400
  freq 4.35103e+08
  culm 39.3952
• paramètres réalisés
  recfile record.Satnogs-UHF.2021-04-13T10-38-00.dat
  start 2021-04-13T10:38:00
  end 2021-04-13T10:44:42
  freq 4.35103e+08
  gain 48
  ns 400
  samp 250000
  nsamp 100000000

Gaussian fit

When the intensity of the signal as a function of time follows an approximately Gaussian law, this tool must capture approximately the parameters by non-linear adjustment. The adjustment is carried out using the NLOPT2 library. The behavior is undefined if the law is arbitrary.

abscisses: giga-samples name ordinates: sum_20000(I²+Q²)/1e6

• Resultats du fit
  t0 500000 [ 2 s]
  a 1000
  sigma 1500000
  y0 2000

calpower-stats

• Autres statistiques (de la valeur I²+Q²)
  moyenne 28.5729
  max 60.5047
  moyenne.debut.fin 22.6337
  hauteur.signal 37.871 [ 15.7831 dB ] (max - moyenne.debut.fin)
  longueur.totale 400
  integrale.signal 2375.68 (somme - moyenne.debut.fin*longueur.totale)

Calculated and measured Doppler comparison

Abscissa: frequency in Hz
Ordinates: time in seconds

sumY2 1.86113e+13
sumDy2 1.5738e+13
dfmin -575.457 sumDy2 1.53627e+13
dtmin 2.12491 sumDy2 1.53198e+13

* Kepler element data for FALCONSAT-3

name ‘FALCONSAT-3’
satellite_number 30776
central_object EARTH
ephemeris_type UnknownEphemerisType
epoch_year 21
epoch_day 101.61184069

• Kepler elements
  epoch_julday 2459316.11184069
  Time jd 2459316.11184 < 2021-04-11 14:41:03.0035 UTC >
  inclination 35.4335 deg [35 26'01"]
  right_ascension_of_ascending_node 169.617 deg [11:18:28]
  major_radius 6824.6 km
  eccentricity 0.0002142
  periast_argument 354.899 deg [354 53'56"]
  mean_anomaly 5.1717 deg [5 10'18"]

• Supplemental data
  cc 1.99957169174
  ra 6.82606e+06 [455054]
  rp 6.82314e+06 [452131]
  va 7645.35
  vp 7642.07
  axb 6826.06 x 6826.06
  mammmdt 17.169
  bstar 0.2593
  mean_motion_1st_deriv 3.756e-05
  mean_motion_2nd_deriv 0
  mean_motion 15.4014 rev/day 0.0649291 day/rev
  periapsis_distance 6823.14 km
  apoapsis_distance 6826.06 km
  periapsis_mean_height 452.131 km
  apoapsis_mean_height 455.054 km
  rev_number_at_epoch 78279
  tle_age 0.934375 day

* TLE

FALCONSAT-3
1 30776U 07006E 21101.61184069 .00003756 00000-0 92593-4 0 9999
2 30776 35.4335 169.6166 0002142 354.8988 5.1717 15.40142038782799

Spectrum analysis

median 13.2148
noise_level_db 13.3088
min 4.87051
max 38.4206
freq_center -1668.3
trig_level_db 10
nbin_rescaling 29.9957
freq_center_trig 1658.33
signal_range_dB 25.1118
theo_range_dB 48.1648 [ 8 bits ]

Post-processing

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 236
  contents =
  0000: a8 98 9a 92 40 40 02 a0 8c a6 66 40 40 03 03 f0
  0010: 1b 89 75 60 00 8a 0f 01 72 0e 02 71 0d 03 d4 04
  0020: 04 db 04 05 de 04 06 ea 04 07 2c 04 08 1c 02 09
  0030: 36 00 0a 59 07 0b 6f 00 0c 62 05 0d 30 03 0e 76
  0040: 05 0f 12 00 10 ba 02 11 16 03 12 10 00 13 fe 0f
  0050: 14 ff 0f 15 dc 01 16 8b 05 17 87 05 18 4e 04 19
  0060: cb 04 1a cf 04 1b 26 00 1c 7e 01 1d da 00 1e 36
  0070: 00 1f 0c 00 20 72 06 21 0a 02 22 0b 02 23 fb 07
  0080: 24 ff 07 25 ff 07 26 d4 04 27 99 04 28 ff 07 29
  0090: ff 07 2a 22 06 2b 4a 06 2c 4c 06 2d 24 06 2e 15
  00a0: 05 2f ff 07 30 64 04 31 c6 04 32 fe 0f 33 fe 0f
  00b0: 34 08 00 35 01 00 36 02 00 37 00 00 38 02 00 39
  00c0: 0e 00 3a ff 0f 3b 0f 02 3c 09 02 3d ff 0f 3e 0b
  00d0: 00 3f 05 00 40 dd 02 41 04 00 42 2e 00 43 a9 02
  00e0: 44 00 00 45 82 02 46 78 02 47 55 02

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 22
  contents =
  0000: a8 98 9a 86 40 40 02 a0 8c a6 66 40 40 03 03 f0
  0010: 43 4c 3a 31 32 31

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 24
  contents =
  0000: 9c 70 9a 90 40 40 00 a0 8c a6 66 40 40 17 03 bb
  0010: 4f 4b 20 4e 38 4d 48 0d

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 115
  contents =
  0000: a2 a6 a8 40 40 40 02 a0 8c a6 66 40 40 17 03 bd
  0010: 20 0c 4f 00 00 00 00 00 00 28 6e 75 60 93 7c 75
  0020: 60 aa 55 01 00 04 0c 4f 00 00 02 00 08 77 65 30
  0030: 34 31 33 30 33 03 00 03 20 20 20 04 00 04 3f 13
  0040: 00 00 05 00 04 e1 5b 75 60 06 00 04 6c 7c 75 60
  0050: 12 00 04 6c 7c 75 60 07 00 01 00 08 00 01 03 09
  0060: 00 02 45 5e 0a 00 02 0f 0b 0b 00 02 50 00 00 00
  0070: 00 4d 6e

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 115
  contents =
  0000: a2 a6 a8 40 40 40 02 a0 8c a6 66 40 40 17 03 bd
  0010: 20 02 4f 00 00 00 00 00 00 94 7c 75 60 66 81 75
  0020: 60 aa 55 01 00 04 02 4f 00 00 02 00 08 41 4c 31
  0030: 32 30 34 31 33 03 00 03 20 20 20 04 00 04 df 12
  0040: 00 00 05 00 04 94 e3 74 60 06 00 04 95 7c 75 60
  0050: 12 00 04 94 7c 75 60 07 00 01 00 08 00 01 c9 09
  0060: 00 02 8a 26 0a 00 02 b3 0c 0b 00 02 50 00 00 00
  0070: 00 d8 c7

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 115
  contents =
  0000: a2 a6 a8 40 40 40 02 a0 8c a6 66 40 40 17 03 bd
  0010: 60 03 4f 00 00 00 00 00 00 67 81 75 60 67 81 75
  0020: 60 aa 55 01 00 04 03 4f 00 00 02 00 08 42 4c 31
  0030: 32 30 34 31 33 03 00 03 20 20 20 04 00 04 98 03
  0040: 00 00 05 00 04 ad e6 74 60 06 00 04 67 81 75 60
  0050: 12 00 04 67 81 75 60 07 00 01 00 08 00 01 ca 09
  0060: 00 02 dd 31 0a 00 02 89 0c 0b 00 02 50 00 00 00
  0070: 00 ed 35

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 81
  contents =
  0000: a8 92 9a 8a 40 40 02 a0 8c a6 66 40 40 03 03 f0
  0010: 50 48 54 3a 20 75 70 74 69 6d 65 20 69 73 20 31
  0020: 31 34 34 2f 31 33 3a 33 37 3a 35 38 2e 20 20 54
  0030: 69 6d 65 20 69 73 20 54 75 65 20 41 70 72 20 31
  0040: 33 20 31 32 3a 30 35 3a 35 37 20 32 30 32 31 0d
  0050: 20

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 62
  contents =
  0000: 98 a6 a8 82 a8 40 00 a0 8c a6 66 40 40 03 03 f0
  0010: 49 20 50 3a 30 78 31 33 41 38 20 6f 3a 30 20 6c
  0020: 3a 33 31 33 36 37 20 66 3a 33 31 34 34 39 2c 20
  0030: 64 3a 31 20 73 74 3a 34 20 65 3a 30 65 0d

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 24
  contents =
  0000: 9c 70 9a 90 40 40 00 a0 8c a6 66 40 40 17 03 bb
  0010: 4f 4b 20 4e 38 4d 48 0d

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 115
  contents =
  0000: a2 a6 a8 40 40 40 02 a0 8c a6 66 40 40 17 03 bd
  0010: 20 0c 4f 00 00 00 00 00 00 28 6e 75 60 66 81 75
  0020: 60 aa 55 01 00 04 0c 4f 00 00 02 00 08 77 65 30
  0030: 34 31 33 30 33 03 00 03 20 20 20 04 00 04 3f 13
  0040: 00 00 05 00 04 e1 5b 75 60 06 00 04 6c 7c 75 60
  0050: 12 00 04 6c 7c 75 60 07 00 01 00 08 00 01 03 09
  0060: 00 02 45 5e 0a 00 02 0f 0b 0b 00 02 50 00 00 00
  0070: 00 72 1d

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 24
  contents =
  0000: 9c 70 9a 90 40 40 00 a0 8c a6 66 40 40 17 03 bb
  0010: 4f 4b 20 4e 38 4d 48 0d

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 27
  contents =
  0000: 84 84 a6 a8 82 a8 00 a0 8c a6 66 40 40 19 03 f0
  0010: 4f 70 65 6e 20 41 42 43 44 3a 20

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 29
  contents =
  0000: a6 a8 82 a8 aa a6 00 a0 8c a6 66 40 40 17 03 f0
  0010: 42 3a 20 37 33 32 35 35 36 32 35 33 0d

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 81
  contents =
  0000: a8 92 9a 8a 40 40 02 a0 8c a6 66 40 40 03 03 f0
  0010: 50 48 54 3a 20 75 70 74 69 6d 65 20 69 73 20 31
  0020: 31 34 34 2f 31 33 3a 33 38 3a 31 34 2e 20 20 54
  0030: 69 6d 65 20 69 73 20 54 75 65 20 41 70 72 20 31
  0040: 33 20 31 32 3a 30 36 3a 31 33 20 32 30 32 31 0d
  0050: 20

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 27
  contents =
  0000: a0 84 98 92 a6 a8 00 a0 8c a6 66 40 40 17 03 f0
  0010: 50 42 3a 20 45 6d 70 74 79 2e 0d

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 271
  contents =
  0000: a2 a6 a8 40 40 40 02 a0 8c a6 66 40 40 17 03 bb
  0010: 02 02 4f 00 00 c9 40 0f 00 4c 54 59 00 09 4f 00
  0020: 00 00 00 00 00 00 00 00 00 f4 00 00 00 07 20 e7
  0030: 5a 75 60 00 00 02 4e 38 4d 48 00 00 00 03 4f 00
  0040: 00 00 00 00 00 00 00 00 00 f4 00 00 00 07 20 ed
  0050: 5a 75 60 00 00 02 4e 38 4d 48 00 00 00 02 4f 00
  0060: 00 00 00 00 00 00 00 00 00 f4 00 00 00 07 20 f2
  0070: 5a 75 60 00 00 02 4e 38 4d 48 00 00 00 0b 4f 00
  0080: 00 00 00 00 00 00 00 00 00 f4 00 00 00 07 20 fa
  0090: 5a 75 60 00 00 02 4e 38 4d 48 00 00 00 09 4f 00
  00a0: 00 00 00 00 00 00 00 00 00 f4 00 00 00 07 20 b5
  00b0: 5b 75 60 00 00 02 57 34 54 42 44 00 00 07 4f 00
  00c0: 00 00 00 00 00 00 00 00 00 f4 00 00 00 11 19 f3
  00d0: 5b 75 60 00 00 00 92 4d 00 00 31 00 00 00 7c 36
  00e0: 00 00 31 1a 62 60 09 11 8e 5f 75 60 00 00 00 7d
  00f0: 36 00 00 32 00 00 00 03 10 92 69 75 60 93 2e 02
  0100: 56 4b 32 45 56 42 00 0c 19 a9 69 75 60 d3 3e

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 81
  contents =
  0000: a8 92 9a 8a 40 40 02 a0 8c a6 66 40 40 03 03 f0
  0010: 50 48 54 3a 20 75 70 74 69 6d 65 20 69 73 20 31
  0020: 31 34 34 2f 31 33 3a 33 38 3a 32 32 2e 20 20 54
  0030: 69 6d 65 20 69 73 20 54 75 65 20 41 70 72 20 31
  0040: 33 20 31 32 3a 30 36 3a 32 31 20 32 30 32 31 0d
  0050: 20

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 27
  contents =
  0000: a0 84 98 92 a6 a8 00 a0 8c a6 66 40 40 17 03 f0
  0010: 50 42 3a 20 45 6d 70 74 79 2e 0d

• MESSAGE DEBUG PRINT PDU VERBOSE *
  ((transmitter . 9k6 FSK downlink))
  pdu_length = 25
  contents =
  0000: a0 84 98 92 a6 a8 00 a0 8c a6 66 40 40 17 03 f0
  0010: 50 42 3a 20 4e 38 4d 48 0d

number of decodings: 19

Credits

Decodage gr-satellites v3.6.0 (Daniel Estevez)

N5FXH’s page

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