Jan 19, 2020, Nighttime Operation Report

20210119_4th.JPG
Hello, everyone. We are NEXUS development project team in Nihon University. Your receiving reports are used for confirmation of NEXUS state. Thank you for your cooperation. We will report the result of nighttime operation today.

CW custom mode
NEXUS are orbiting at CW custom mode now. CW format is following.
JS1YAVNEXUS04 (Sattime : 8words) (SW info : 2words) (Reset info : 10words) (Bat Vol : 4words) (Gyro x : 4words) (Gyro y : 4words) (Gyro z : 4words)
Total : 49words (characters)

○Operation Result
We performed nighttime operations twice.
"CW custom operation(437.075MHz)",”Video data downlink(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)”.

・CW Operation
For CW telemetry format, please have a look at the pdf below.
http://sat.aero.cst.nihon-u.ac.jp/nexus/download/NEXUS_CW_telemetry_format_e.pdf
4th : CW:S9[dB], Bus Voltage: 4.121 [V], Angular velocity: 57.58 [deg./s]
5th : CW:S9[dB], Bus Voltage: 4.113 [V], Angular velocity: 58.08 [deg./s]

4th:”Video data downlink(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)(Size:5987328 SC_S:22, SSC:24, SP:8, ESC:24, EP:247)”
Number of received packets
HORIZONTALLY POLARIZED WAVE : 371
VERTICAL POLARIZED WAVE : 462
radio interference : weak

5th:”Video data downlink(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)(Size:5987328 SC_S:22, SSC:24, SP:512, ESC:24, EP:767)”
Number of received packets
HORIZONTALLY POLARIZED WAVE : 796
VERTICAL POLARIZED WAVE : 0
radio interference : weak

○Next Operation Schedule
1st : "CW custom operation(437.075MHz)", ”Video data downlink(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)(Size:5987328 SC_S:22, SSC:24, SP:24, ESC:24, EP:151)”.
2nd : "CW custom operation(437.075MHz)", ”Video data downlink(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)(Size:5987328 SC_S:22, SSC:24, SP:524, ESC:24, EP:767)”.

2021/1/20      AOS     |       PE      |      LOS
------------------------------------------------------------------------------------------
Time(JST)    8:05:37 | 8:11:06 | 8:16:30
Azimuth      20.76  |   98.20   |  175.20
Elevation      0.01   |    35.48   |   0.00
------------------------------------------------------------------------------------------
Time(JST)    9:39:50 | 9:44:17 | 9:48:42
Azimuth      345.27  |   292.43   |  239.17
Elevation      0.02   |    10.91   |   -0.02
------------------------------------------------------------------------------------------

○Latest TLE
1 43937U 19003F 21018.62738326 .00001342 00000-0 55999-4 0 9999
2 43937 97.1987 67.6907 0023611 179.4629 180.6639 15.25096712111425

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