SpaceX будет теперь шифровать телеметрию во время пусков

vakhnenko — 10.04.2021 Интересные треды на Реддите: Together with a friend we found plain text in Falcon-9's S-Band downlink и SpaceX vehicle decoding and encryption, part 2: it's all encrypted now.

Вкратце, раньше иксы не шифровали телеметрию во время пусков:



В результате чего энтузиасты могли получать из неё текстовую информацию:


(в комментариях по первой ссылке выше есть разбор части этой телеметрии)

ddiwa
5qkckrE6b
Plzdyd5
82899298259173> Naw aphemeriS(~a,id: 1) for8
Mar 4 08:48:26 stmm1c"system_housekeeping
or: Periodic uelem_2v09
qk)vping 2 step(s) (569 skipped in
(cycles)
1855033 cycles)
88248810(stm}1c system_iousek%epijg
molitorj Pd
iodic(vmlem_2 0): skiPqing 2 Ytorhs
avlvu
tep(s) (580 skippmd in 1855049 cycles)
Mar 4 08:48:12 stmm1c system_houseke
ping_monitor:0Periodic(telem_300): scipping`" step(s) `580 skipped in 1855049 cycles)
vZ'ntawov"3
zffffAP.
)M`r$ 4 0>:48:14 stmm1c systee_h/usekeeping_monitor: Periodic(telem_260): skipping 2 step(s) (583 skipped in 1855066 cycles)
Mar 4 08:48:14 stmm1c system_housekeeping_monitor: Periodic(telem_300): skipping 2
step(s) (58; scipped inf1855066 cycles)
gjolz
fffgaX1[
Map8 4 08"48:16 stmm3c ryrtem_housekeepiio_mo.itor:
PerIodic(telUU_260': sjippi
g 1 Step(s) (58> skixped
1846082,cygles)"
Mar 4 08:48:16 stmm1c system_ho}seka
pingOmonipor: Pepiodic(tele-_300): skmpping 10Ctep(s)
6 skip0ed i. 1855082 cycles)
0$#ycles)
qcbirE2}+
.zyeaz|
286304492> New ephemer
s(valid: 1 foz GPS L1CA 7, fi:1440>*0
72&.$New Upheaeris(valid
fuekd>
9288306143> New ephemeris(valid: 1) for GPS L1CA 00, fi:1440
eping_moni|or: Periolic(te
2 Nav phase fhQp - h
f gxgle qlip dgtected, b5d not
orrected
M`r 5 08:48:17 stmm1c {ystem_housekee
eng_monitor: Periodic(telemO"6p): skipping 3 stap(s) (624 skipped in 1855256 cycles)
bfbnff3
Vkedye
vuekd>
krdmj
Muieaa,E
avuyh
1298883005511536438> 8 PLL stress
0Mar 4 08:49:48 sfc1a system_housekeeping_monitor: 185760.000165: mark: 2021-03-04 08:49:48.664675000
I98883007182658361> 21 PLL stress
1298883007286287195> GPS L1CA 8 subframe parity mismatch (word 6)
298883007289301017> GPS L1CA 21 Nav phase flip - half cycle slip detected, but not corrected
1298883011302109836> solution x/y/z: 4314896.0 1601224.3 4714828.2 PDOP=1.2 n_sats=11
n36486> solution tow:377410.9121125335, wn:2147
Mar 4 08:49:54 sfc1a falcon_control: 185764.830051: ALARM [radiation_fdir_activation_guard]: [gnc.mission_time_f64.hi V: 1500.060000 T: 1500.000000]
/Mar 4 08:49:54 sfc1a falcon_control: 185764.830082: AlarmEventSequenceHandler: radiation_fdir_activation_guard -> radiation_fdir_activate.event
1298883017329602541> 8 PLL stress
1298883017707058510> 8 low CN0 too long, dropping (@ 185776226184000000.000)
`1298883019267326137> New ephemeris(valid: 1) for GPS L1CA 13, fi:14400
meris(valid: 1) for GPS L1CA 14, fi:14400
1298883019269457839> New ephemeris(valid: 1) for GPS L1CA
1298883019270332724> New ephemeris(valid: 1) for GPS L1CA 15, fi:14400
506> New ephemeris(valid: 1) for GPS L1CA 30, fi:14400
1298883019277330474> New ephemeris(valid: 1)
1298883019278335661> New ephemeris(valid: 1) for GPS L1CA 24, fi:14400
T8883019282340788> New ephemeris(valid: 1) for GPS L1CA 19, fi:14400
1298883019285322299> New ephemer!
is(valid: 1) for GPS L1CA 7, fi:14400
1298883019289339733> New ephemeris(valid: 1) for GPS L1CA 18, h
1298883019289464740> New ephemeris(valid: 1) for GPS L1CA 12, fi:14400
New ephemeris(valid: 1) for GPS L1CA 10, fi:14400
1298883021502140305> solution x/y/z: 4319586.4 1672060.7 4686752.1 PDOP=2.4 n_sats=8
AxxattA1A^
2600> solution tow:377421.1121341102, wn:2147
1298883025279287916> GPS L1CA 5 Nav phase flip - half cycle slip detected, but not corrected
025286295882> GPS L1CA 8 Nav phase flip - half cycle slip detected, but not corrected
s1298883028706049129> 21 low CN0 too long, dropping (@ 185787225102000000.000)
1298883031279362947> GPS L1CA 5 Nav phase flip - half cycle slip detected, but not corrected
%031290080465> GPS L1CA 21 Nav phase flip - half cycle slip detected, but not corrected
|1298883031701952848> solution x/y/z: 4323750.2 1742646.5 4657999.3 PDOP=1.7 n_sats=9
3679> solution tow:377431.3120631988, wn:2147
1298883032143600271> Tracking! PRN:31
bffffAP~
pound 31 over 120.0 kHz in 353 ms, CN0:37.0 dB
dffffAP
fffffAP
hffffAP
jffffAP
1298883034706164574> 31 no sync, dropping
lffffAP
nffffAP
1298883035942782209> 5 PLL stress
pffffAP
rffffAP
tffffAP
3037279350061> GPS L1CA 5 subframe parity miqmatch (word 8)
zse flip - half cycle sliP deTected, but not corrected
vffffAP
xffffAP
zffffAP
pbvapbva
3041902000456> solution x/y/z: 4327407.9 1812980.1 4628573.8 PDOP=1.6 n_sats=10
d solution tow:377441.5122801508, wn:2147
1298883042308802495> 5 PLL stress
1298883042707485199> 5 low CN0 too long, dropping (@ 185801226597000000.000)
1298883043286481741> GPS L1CA 8 Nav phase flip - half cycle slip detected, but not corrected
Mar 4 08:50:25 stmm1a system_slate_sharer: 185700.001191: mark: 2021-03-04 08:50:25.786092000
~sMar 4 08:50:26 stmm1a system_housekeeping_monitor: 185700.001369: mark: 2021-03-04 08:50:26.258105000
Mar 4 08:50:26 stmm1c system_slate_sharer: 185700.000044: mark: 2021-03-04 08:50:26.280315000
Mar 4 08:50:26 stmm1c system_housekeeping_monitor: 185700.000223: mark: 2021-03-04 08:50:26.709828000
}1298883049266914235> New ephemeris(valid: 1) for GPS L1CA 13, fi:14400
meris(valid: 1) for GPS L1CA 14, fi:14400
1298883049269650063> New ephemeris(valid: 1) for GPS L1CA
1298883049271424312> New ephemeris(valid: 1) for GPS L1CA 15, fi:14400
635> New ephemeris(valid: 1) for GPS L1CA 30, fi:14400
1298883049277253087> New ephemeris(valid: 1) ]0
esMar 4 08:50:32 stmm1b system_slate_sharer: 185700.001211: mark: 2021-03-04 08:50:32.033308000
1298883049279423719> New ephemeris(valid: 1) for GPS L1CA 24, fi:14400
Mar 4 08:50:32 stmm1b system_housekeeping_monitor: 185700.000593: mark: 2021-03-04 08:50:32.245662000
q8883049281419525> New ephemeris(valid: 1) for GPS L1CA 19, fi:14400
1298883049281641048> New ephemer
is(valid: 1) for GPS L1CA 20, fi:14400
1298883049281703765> New ephemeris(valid: 1) for GPS L1CA 23,
1298883049289429535> New ephemeris(valid: 1) for GPS L1CA 12, fi:14400
> New ephemeris(valid: 1) for GPS L1CA 10, fi:14400
1298883049290431077> New ephemeris(valid: 1) for
D52102168747> solution x/y/z: 4330545.8 1883044.9 4598476.6 PDOP=1.6 n_sats=10
olution tow:377451.7121195335, wn:2147
1298883059715777861> 7 PLL stress
1298883061286346973> GPS L1CA 8 Nav phase flip - half cycle slip detected, but not corrected
r1298883061391728998> 7 PLL stress
61827721820> 7 PLL stress
1298883062302136084> solution x/y/z: 4333158.5 1952832.6 4567708.4 PDOP=2.
1298883062302217340> solution tow:377461.9121034250, wn:2147
1298883063632903297> 5 PLL stress
1298883064440153900> Tracking! PRN:22
1298883065717002080> 15 PLL stress
mar 4 08:50:48 sfc1a system_housekeeping_monktor: 185820.000131: mark: 2021-03-04 08:50:48.664341000
?1298883066704991519> 22 no sync, dropping
1298883066705107566> 7 low CN0 too long, dropping (@ 18582
6rvbxg
1298883070234921610> 5 PLL stress
1298883070739086508> 15 PLL stress
IP11117809> 15 PLL stress
1298883072502025152> solution p/y/z: 0.0p0.0 0.0 PDOP=0.0 n_sats=0

И даже видео:

Got video from today's launch of #SpaceX #Falcon9 rocket yet again, as usual on S transponder 2272.5MHz!
Decoded with @aang254's SatDump software.
Setup as usual WiFi mesh antenna, MMDS convertor and Airspy MINI SDR! pic.twitter.com/uXHAEwAdT4

— FelixTRG (@OK9UWU) March 24, 2021

Примеры скриншотов (кликабельно):



Но теперь лафа кончилась. Почему именно сейчас неясно, компания никак свое решение не прокомментировала. Мое мнение -- после того как информация попала в публичное поле, заволновались вояки -- мол, мы тут и секретные КА пускаем на вашей ракете, и сама она попадает под ITAR, а у вас видеопоток и иные данные с верхней ступени открыто идут?

Да, кстати -- телеметрия с испытаний Старшипа была с самого начала шифрованной.

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