DTUsat-2 receiving 2.4GHz2017年11月26日 18時29分

10:39-10:52JST, 26 Nov 2017, Ele 64 SE-E-N, 2401.843MHz

このパスでは AOS直後に 2回、2.4GHz信号を聞くことができました。何年か前の
DTUsat-2観測結果の 2401.843MHz を基に、ドップラーシフトの 55kHz を足すと
理論上の受信周波数は 2401.898MHz となりますが、DTUsat-2 の信号が聞こえた
その時の SDR# の周波数表示は 2401.914MHz でした。つまり、その差 16kHz が
コンバーター (2401.000→145.000, Shift 2,256,000,000 in SDR#) の表示差異
となり、+16kHz することが 2.4GHz衛星を受信する時の自局の目安となります。

Horyu-4 receiving 2.4GHz2017年11月26日 19時16分

2017年10月31日00:01JSTに受信した Horyu-4 の 2.4GHz受信の上図で、再計算し
てみます。SDR# 図では 2400.324MHz と数値表示されていますが、フィルター幅
は 16kHz なので、Horyu-4 の信号幅100kHz を考慮すると、SDR#スペクトラムの
100kHz幅の中心を示す赤線は、本来は 2400.324MHz+16kHz=2400.340MHz付近に
あります。この時の理論上のドップラーシフトを含む受信周波数は 2400.324MHz
と上図に表示されているので、結局 2400.324MHz と 2400.340MHz の差の 16kHz
がコンバーター (2401.000→145.000) の表示差異となり、今、DTUsat-2 衛星で
算出した表示差異 16kHz と一致します。

Changes to AMSAT-NA TLE Distribution2017年11月26日 20時55分

Changes to AMSAT-NA TLE Distribution for 11-21-2017, Object Comment

Due to Thanksgiving being on Thursday, the AMSAT-NA TLE Distribution
for this week will be today, November 21, 2017. Next week we will
continue with the normal TLE distribution on each Thursday of the
week. Note that, per comments below, AO-91 is most likely object 43016.

It appears that AO-91 is in the group of cubesats launched on 11-18-
17 that include objects 43016, 43017, and 43018. The object 43015
that we were using for AO-91 has separated enough to be confirmed as
Buccaneer RRM by 18th Space Control Squadron at Vandenburg AFB, CA.
One of 18 SPCS many missions is launch analysis.

Therefore, based analysis (by Nico Janssen, (PA0DLO) and discussion
by Alan Biddle (WA4SCA), Jerry Buxton (N0JY), Nico Janssen (PA0DLO),
Paul Stoetzer (N8HM) and myself AO-91 is most likely object 43016.
Note that these objects are still very close together and one more
change could be needed. The process of identification is one of
waiting for a group of objects to separate enough to isolate the one
you are interested in and positively identify it's signal as matching
a certain TLE set. Simple, right!

For comparison, Buccaneer (object 43015, not AO-91) is now at least
26 seconds from objects 43016, 43017, and 43018.  Objects 43016,
43017, and 43018 are still about 2 seconds apart. (Analysis by Nico,PA0DLO)
[ANS thanks Ray Hoad for the above information]

EagleSat-1 Requests Help Listening for Beacon

RadFxSat-1/Fox-1B AO-91's P-POD mate on the ELaNa XIV, EagleSat-1:
their team is having trouble hearing their beacon on 437.645MHz. The
beacon transmission timing is 1 minute. Please send reception
reports to Deborah Jackson (jacksd40 at my.erau.edu) and Steven Buck
(bucks2 at my.erau.edu) ... via
[ANS thanks Jerry N0JY for the above information]

Planned flight program2017年11月26日 23時55分


UTC 28 Nov 2017
05:41:46 - Launch of the space rocket;
05:43:44 - Department of the 1st stage;
05:45:33 - Resetting the head fairing;
05:46:33 - Branch 2 steps;
05:51:09 - Head Unit Branch;
05:52:09 - 05:53:26 - RB "Frigate". Formation of the first transition orbit;
06:40:10 - 06:41:07 - the RB "Frigate". Formation of the orbit of the separation of spacecraft "Meteor-M";
06:42:08 - Department of spacecraft "Meteor-M" (orbit i = 98.57°, H = 828.7 km, h = 788.9 km);
07:21:01 - 07:21:24 - RB "Frigate". Formation of the second transition orbit;
08:01:43 - 08:05:03 - Department of spacecraft IDEA (orbit i = 97.95°, H = 814.2 km, h = 581.6 km);
08:13:21 - 08:13:37 - RB "Frigate". Formation of the orbit of the branch of the MCA group;
08:15:17 - Department of spacecraft "Baumanets" (orbit i = 97.76°, H = 600.1 km, h = 592.7 km);
08:20:00 - 08:35:00 - Separation of payload SEAM and spacecraft AISSat (orbit i = 97.76°, H = 601.8 km, h = 583.9 km);
08:59:21 - 08:59:44 - RB "Frigate". Formation of the third transition orbit;
09:50:01 - 09:50:46 - RB "Frigate". Formation of the orbit of the spacecraft LEO Vantage;
09:54:06 - Division of spacecraft LEO Vantage (orbit i = 99.46°, H = 1002.2 km, h = 996.8 km);
10:42:41 - 10:43:19 - Transfer of the accelerating unit to the trajectory of the entrance to the atmosphere;
~11:16:57 - The entry of the accelerating unit into the atmosphere (altitude 100 km). Flooding in the water area of the Pacific Ocean.