Observation record.Satnogs-UHF.2021-04-18T08-55-00

Ground-station Satnogs-UHF
Owner N5CNB

Waterfall
DopplerComparaison
PostProcessing

Résumé de l'événement

satellite FALCONSAT-3
date 2021-04-18
time 08:55:00
duration 410
freq 4.35103e+08
culm 57.9098

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.2021-04-18T08-55-00.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.2021-04-18T08-55-00
satellite FALCONSAT-3
date 2021-04-18
time 08:55:00
samp 250000
duration 410
freq 4.35103e+08
culm 57.9098
paramètres réalisés
recfile record.Satnogs-UHF.2021-04-18T08-55-00.dat
start 2021-04-18T08:55:00
end 2021-04-18T09:01:52
freq 4.35103e+08
gain 48
ns 410
samp 250000
nsamp 102500000

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 39.4985
max 134.258
moyenne.debut.fin 33.1252
hauteur.signal 101.132 [ 20.0489 dB ] (max - moyenne.debut.fin)
longueur.totale 410
integrale.signal 2613.04 (somme - moyenne.debut.fin*longueur.totale)

Calculated and measured Doppler comparison

record.Satnogs-UHF.2021-04-18T08-55-00.fft.scattered.df.png

Abscissa: frequency in Hz
Ordinates: time in seconds

sumY2 3.62399e+13
sumDy2 2.19599e+13
dfmin 576.789 sumDy2 2.13952e+13
dtmin -1.63452 sumDy2 2.13424e+13

* Kepler element data for FALCONSAT-3

name ‘FALCONSAT-3’
satellite_number 30776
central_object EARTH
ephemeris_type UnknownEphemerisType
epoch_year 21
epoch_day 106.5382807

Kepler elements
epoch_julday 2459321.0382807
Time jd 2459321.03828 < 2021-04-16 12:55:07.0452 UTC >
inclination 35.4329 deg [35 25'58"]
right_ascension_of_ascending_node 137.984 deg [9:11:56]
major_radius 6824.49 km
eccentricity 0.0001354
periast_argument 48.923 deg [48 55'23"]
mean_anomaly 311.1615 deg [311 09'41"]
Supplemental data
cc 1.99972923666
ra 6.82541e+06 [454407]
rp 6.82357e+06 [452558]
va 7644.81
vp 7642.74
axb 6825.41 x 6825.41
mammmdt 354.192
bstar 0.7478
mean_motion_1st_deriv 3.963e-05
mean_motion_2nd_deriv 0
mean_motion 15.4018 rev/day 0.0649275 day/rev
periapsis_distance 6823.57 km
apoapsis_distance 6825.41 km
periapsis_mean_height 452.558 km
apoapsis_mean_height 454.407 km
rev_number_at_epoch 78355
tle_age 1.17278 day

* TLE

FALCONSAT-3
1 30776U 07006E 21106.53828070 .00003963 00000-0 97478-4 0 9999
2 30776 35.4329 137.9840 0001354 48.9230 311.1615 15.40179229783558

Spectrum analysis

median 14.339
noise_level_db 14.3998
min 5.58528
max 42.7683
freq_center -4135.5
trig_level_db 10
nbin_rescaling 29.9957
freq_center_trig -7715.04
signal_range_dB 28.3686
theo_range_dB 48.1648 [ 8 bits ]

Post-processing

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 = 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 = 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 = 236
contents =
0000: a8 98 9a 92 40 40 02 a0 8c a6 66 40 40 03 03 f0
0010: 89 08 7c 60 00 a1 0f 01 7a 0e 02 84 0d 03 93 04
0020: 04 a3 04 05 a4 04 06 a4 04 07 eb 03 08 f8 01 09
0030: 38 00 0a 59 07 0b 6f 00 0c 61 05 0d 09 00 0e 52
0040: 00 0f 0f 00 10 0e 00 11 14 00 12 11 00 13 fe 0f
0050: 14 fe 0f 15 51 00 16 52 00 17 52 00 18 52 00 19
0060: 93 04 1a 99 04 1b 27 00 1c d8 00 1d d0 00 1e 60
0070: 05 1f 0c 00 20 72 06 21 b0 02 22 f0 02 23 fc 07
0080: 24 ff 07 25 ff 07 26 7a 04 27 41 04 28 ff 07 29
0090: ff 07 2a e8 05 2b e4 05 2c e8 05 2d b2 05 2e c6
00a0: 04 2f ff 07 30 96 04 31 98 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: 11 00 3a ff 0f 3b f6 01 3c eb 01 3d fe 0f 3e 0b
00d0: 00 3f 05 00 40 dd 02 41 03 00 42 2d 00 43 a9 02
00e0: 44 ff 0f 45 82 02 46 71 02 47 5e 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 = 76
contents =
0000: aa a6 82 8c 82 40 02 a0 8c a6 66 40 40 03 03 f0
0010: 3e 52 65 6c 6f 61 64 20 63 6f 6d 70 6c 65 74 65
0020: 2c 20 42 42 53 20 61 6e 64 20 64 69 67 69 20 6f
0030: 70 65 6e 2c 20 55 6e 70 72 6f 74 6f 20 41 50 52
0040: 53 20 76 69 61 20 50 46 53 33 2d 31

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 39 2f 31 31 3a 35 35 3a 30 38 2e 20 20 54
0030: 69 6d 65 20 69 73 20 53 75 6e 20 41 70 72 20 31
0040: 38 20 31 30 3a 32 33 3a 30 37 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 = 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 39 2f 31 31 3a 35 35 3a 31 36 2e 20 20 54
0030: 69 6d 65 20 69 73 20 53 75 6e 20 41 70 72 20 31
0040: 38 20 31 30 3a 32 33 3a 31 35 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 31 31 0d

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 = 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 = 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 39 2f 31 31 3a 35 35 3a 32 34 2e 20 20 54
0030: 69 6d 65 20 69 73 20 53 75 6e 20 41 70 72 20 31
0040: 38 20 31 30 3a 32 33 3a 32 33 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 31 31 0d

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 = 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 37 34 36 36 32 31 35 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 39 2f 31 31 3a 35 35 3a 33 32 2e 20 20 54
0030: 69 6d 65 20 69 73 20 53 75 6e 20 41 70 72 20 31
0040: 38 20 31 30 3a 32 33 3a 33 31 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 31 31 0d

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 = 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 39 2f 31 31 3a 35 35 3a 34 30 2e 20 20 54
0030: 69 6d 65 20 69 73 20 53 75 6e 20 41 70 72 20 31
0040: 38 20 31 30 3a 32 33 3a 33 39 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 31 31 0d

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 = 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 = 85
contents =
0000: 84 86 a4 40 40 40 02 a0 8c a6 66 40 40 03 03 f0
0010: 42 43 52 3a 62 76 3d 31 31 36 39 20 62 69 3d 32
0020: 31 36 20 73 65 6e 73 3d 31 33 37 37 20 74 6f 70
0030: 3d 31 31 36 39 20 6c 6f 77 3d 30 20 74 31 3d 35
0040: 30 33 20 74 32 3d 31 30 30 31 20 73 76 3d 38 32
0050: 20 73 69 3d 39

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 31 31 0d

number of decodings: 26

Credits

Decodage gr-satellites v3.6.0 (Daniel Estevez)

N5FXH’s page