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米国发佈中国发射 Tianwang-1A Tianwang-1B Tianwang-1C 之消息 [复制链接]

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离线bm2caj
 
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只看楼主 倒序阅读 0楼 发表于: 2015-10-16
米国发佈中国发射 Tianwang-1A Tianwang-1B Tianwang-1C 之消息

Beijing Launches Three More Amateur Radio Satellites


On September 25,2015 at 01:41 UT Beijing launched three satellites with
amateur radiopayloads from the Jiuquan Satellite Launch Center (JSLC)
in the
Gobidesert, Inner Mongolia. They were carried on a new launcher, Beijing’s
firstsolid-fuel rocket Chang Zheng 11 (CZ-11), and deployed in a 470 x
485km,
97.3 degree inclination Sun Synchronous Orbit (SSO).

This launchoccurred just over 5 days after nine satellites carrying amateur
radiopayloads were launched by Beijing from the Taiyuan Satellite Launch
Center(TSLC) in Shanxi on September 19 at 23:01 UT.

The satellites weredeveloped by students at the Nanjing University of
Aeronautics andAstronautics in collaboration with the Shanghai Engineering
Center forMicrosatellites (SECM).

The main goal of the mission is to experimentwith Software Defined Radio
(SDR) in space. The amateur radio payloads willbe used for exchanging
Telemetry, Tracking and Command (TT&C) informationwith the amateur radio
ground control station. Information about thetelemetry will be made
publicly
available so that radio amateurs aroundthe world may track and monitor the
health of the satellites.

Otherpayloads include a video camera along with receivers fordual-band
GPS/Beidou, Maritime Automatic Identification System (AIS) andAeronautical
Automatic Dependent Surveillance Broadcast (ADS-B).

UsingMEMS based cold-gas micropropulsion it is planned to demonstrate
formationflying by two of the CubeSats along with inter satellite
communication usingGAMALINK 2.4 GHz spread spectrum at 1 Mbps and the
CubeSat
Space Protocol(CSP).

The TW-1A and TW-1B CubeSats are 2U (20x10x10cm) in size whileTW-1C is 3U
(30x10x10cm).

Michael Chen BD5RV reports the satelliteshave these downlinks in the
435-438
MHz ITU Amateur Satellite Serviceallocation:
• Tianwang-1A (TW-1A / SECM): Camera, 435.645 MHz GMSK 4800/9600CSP TX
interval 10s
• Tianwang-1B (TW-1B / NJUST-2): AIS, 437.645 MHz GMSK4800/9600 CSP TX
interval 20s
• Tianwang-1C (TC-1C / NJFA-1): ADS-B,435.645 MHz GMSK 4800/9600 CSP TX
interval 10s
Note: TW-1A and 1C use thesame frequency.

On the same launch was the technology demonstrationsatellite Pujian-1 which
has WiFi for intra-satellitecommunications.

Object identification from information supplied by NicoJanssen PA0DLO and
Zhang Xuan BH4DBE:
TW-1A object 40928,2015-051B
TW-1B object 40927, 2015-051C, (other IDs: TianWang 1B,NJUST-2)
TW-1C object 40926, 2015-051D
Pujian 1 object 40925,2015-051A
Chang Zheng 11 (CZ-11) fourth stage object 40929,2015-051E

Keplerian Two Line Elements (TLEs) ‘Keps’ for new satelliteslaunched in
past
30 days
http://celestrak.com/NORAD/elements/tle-new.txt

ShanghaiEngineering Centre for Microsatellites
http://www.microsate.com/en/

GAMALINKin Space
http://tekevernews.blogspot.co.uk/2015/07/gamalink-in-space.html

IARUSatellite Frequency Coordination pages
http://amsat.org.uk/iaru/

Satellitetracking information
http://amsat-uk.org/beginners/satellite-tracking/

Addingnew satellites to SatPC32, Gpredict and Nova
http://amsat-uk.org/2013/11/23/adding-new-satellites-to-satpc32/


[ANSthanks AMSAT-UK for the aboveinformation]


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离线BA7KW
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只看该作者 1楼 发表于: 2015-10-17
能用什么解调下行的信号呢?
BA7KW  张建华
BA7KW"at"163.com
离线bm2caj
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只看该作者 2楼 发表于: 2015-10-17
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BA7KW:能用什么解调下行的信号呢? (2015-10-17 00:22) 

要解 GMSK 4800/9600
离线BA7KW
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只看该作者 3楼 发表于: 2015-10-17
用RTL手指来解应该可以的,不知道用什么软件。
lilac2的linux cd解他的9600数据很顺利,不知能移植来收这个?

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离线BA7NQ
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回 BA7KW 的帖子
BA7KW:用RTL手指来解应该可以的,不知道用什么软件。
lilac2的linux cd解他的9600数据很顺利,不知能移植来收这个? (2015-10-17 01:41) 

KPC 9612+ TNC
我的微博: http://t.sina.com.cn/ba7nq
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离线BG2BHC
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只看该作者 5楼 发表于: 2015-10-17
我们帮他们做了一个解码软件,差不多是9600 fsk AX.25和我们的混在一起那么个格式
有些梦想一直会在。

------“火腿”是业余无线电爱好者的意思吗?听上去很好吃。
------我的呼号后缀是BHC,意思是“不好吃”…
离线刘文政
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只看该作者 6楼 发表于: 2015-10-17
他们自己用GOMSPACE的专用接收解调设备,一个19寸1U的设备……
离线BA7KW
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回 BG2BHC 的帖子
BG2BHC:我们帮他们做了一个解码软件,差不多是9600 fsk AX.25和我们的混在一起那么个格式 (2015-10-17 07:34) 



用你们的软件改改频率能收到解调吗?
BA7KW  张建华
BA7KW"at"163.com