好消息！ 新业余卫星HAMSAT将于今日（5月5日）发射！ [复制链接]

好消息！ 新业余卫星hamsat将于今日发射！

相关新闻：
《印度将首次进行一箭双星发射 总统现场观看》
据印度报业托拉斯报道，印度5日将在斯里哈里科塔岛的发射平台使用极轨卫星运载火箭Ｃ－6发射两颗卫星，印度总统卡拉姆将在现场观看卫星发射实况。火箭搭载的两颗卫星分别是遥感卫星ＣａｒｔｏｓａｔＩ和名为Ｈａｍｓａｔ的业余无线电卫星。

http://news.sina.com.cn/w/2005-05-05/02535812736s.shtml

hamsat相关信息：
hamsat (vusat)
uplink 435.250 lsb/cw
downlink   145.900 usb/cw
beacon 145.936 unmodulated carrier
145.860 telemetry
launch q2 2005

status: future launch
hamsat has been constructed by amsat india and isro. it carries two 1watt linear transponders, and an fm beacon. hamsat is currently scheduled for launch approximately 05:20z on 5 may, 2005 aboard pslv-6 to be launched from the isro launch complex in india.

http://www.amsat.org/amsat-new/satellites/status.php#hamsat
http://www.amsat.org/amsat-new/satellites/sat_summary/hamsat.php

hamsat is a microsatellite for providing satellite based amateur radio services to the national as well as the international community of amateur radio operator ( ham's) . launched as an auxiliary payload on pslv-6 by the indian space research organisation (isro) along with cartosat-1 , the 42.5 kg hamsat will meet the long felt need of the amateur radio operators in the south asian region who possess the required equipment and operate in the uhf / vhf band based satellite radio communication. one of the transponders of hamsat has been developed indigenously involving indian ham's with the expertise of isro and the experience of amsat-india. the second transponder has been developed by a dutch radio amateur operator and graduate engineering student at higher technical institute, venio, netherlands.
hamsat is india's contribution to the international community of amateur radio operators. this effort is also meant to bring isro's satellite services within the reach of the common man and popularize space technology among the masses.

this satellite will play a valuable role in the national and international scenario by providing a low cost readily accessible and reliable means of communications during emergencies and calamities like foods , earthquakes etc. it will stimulate technical interest and awareness among the younger generation by providing then with an opportunity to develop their technological projects including offering a platform. some of the new technologies being tested in hamsat include integrated processor based electronic bus management unit, lithium ion battery and gallium arsenide based solar panels.

satellite features:
physical: 630 mm x 630 mm x 550 mm cuboid
mass: 42.5 kg
orbit: near circular polar low earth orbit
structure: aluminium honeycomb structure
power: body mounted gallium arsenide solar panels, lithium ion battery
stabilisation: spin stabilized (4 +/- 0.5 rpm)
antennas: uhf turnstile vhf turnstile
transponder uplink: 435.250 mhz
transponder downlink: 145.900 mhz
beacons - 145.936 mhz (unmodulated carrier) or 145.860 mhz cw telemetry
transponder bandwidth: 60 khz
transmitter output: 1 watt
modes of communication: cw, ssb, fm

Ｈａｍｓａｔ将使南亚的业余无线电爱好者的ＨＡＭ通信产生革命性突破。

我们的“神六”也可以带个转发器

好消息，虽然还是leo，但总比来去都是ao-51、fo-29好。
现在就是想把旋转器连上电脑，由卫星追踪软件来控制旋转器。

好象不能用fm方式来工作呀！全是边带方式啊！没有v/u的边带机啊！

nova如何下载添加Ｈａｍｓｔａ轨道数据

'

nova如何下载添加Ｈａｍｓｔａ轨道数据

'

暂时还没有轨道数据。

'

暂时还没有轨道数据。

'

看到了....

hamsat
1 28650u 05017b   05126.79234853 -.00001176 00000-0 -14472-3 0   156
2 28650 097.9109 201.0747 0026119 240.8626 118.9864 14.80800277   235

大家赶快研究一下，怎么尽快把这个卫星利用起来啊

只有fm机，暂时无法利用。

'

看到了....
hamsat
1 28650u 05017b   05126.79234853 -.00001176 00000-0 -14472-3 0   156
2 28650 097.9109 201.0747 0026119 240.8626 118.9864 14.80800277   235

'

气，我一直使用这个
http://celestrak.com/norad/elements/amateur.txt
结果还是要到amsat去下载。

'

好象不能用fm方式来工作呀！全是边带方式啊！没有v/u的边带机啊！

'

刚才卫星覆盖香港的时候试了一下，信号比fo-29强，但在下行频率范围有两个非法台在工作，把下行信号盖住了。

大家可以试一下，数据是手工录入nova的，地点是连云港。

卫星名   日期   进入时间 离开时间 待续时间 进入方位 最大仰角 离开方位
hamsat      05-5-8      2151      2115      0023   139       27     2  
hamsat      05-5-8      2206      2319      0013       197       ?23?   332
2005年5月9日                                                
hamsat      05-5-9      0900      0939      0003         52         5     125
hamsat      05-5-9      1002      1007      0002         12       86   192
hamsat      05-5-9      1246      1226      0040   340       7     255

自己根据格式说明也可以手工方式在nova中录入hamsat的轨道数据
setup---satellites-----在录完数据后按add加入就可。。

sb kep arl arlk029
arlk029 keplerian data

special thanks to amsat-na (amsat.org) for the following keplerian
data.

decode 2-line elsets with the following key:
1 aaaaau 00 0 0 bbbbb.bbbbbbbb .cccccccc 00000-0 00000-0 0 dddz
2 aaaaa eee.eeee fff.ffff ggggggg hhh.hhhh iii.iiii jj.jjjjjjjjkkkkkz
key: a-catalognum b-epochtime c-decay d-elsetnum e-inclination f-raan
g-eccentricity h-argperigee i-mnanom j-mnmotion k-orbitnum z-checksum


hamsat
1 28650u 05017b   05125.98148460 -.00003415 00000-0 -43374-3 0   98
2 28650 097.9110 200.2741 0026141 243.7816 116.0728 14.80796870   118

晚上 21:15 --20 分左右收到了: 145.90 附近有 cw敲 cq , 145.91 附近usb 有日本電台喊 cq, (從 145.87--145.93 mhz 是 hamsat 中繼下傳 cw/usb 信號頻段, 145.94 沒聽到 cw無調制beacon, 我使用 kenwood ts790, u/v 苗子天線. 沒用前置放大器, 收得信號相當清楚.

明天 10:45 起 hamsat 由北邊切入台灣, 涵蓋日, 韓, 全中國, 到時再聽聽看.

太好了。。。。。。。。。。。。

又多一个绝大多数ham没法用的业余卫星。。。。。。

刚在hamsat 05-5-9 0900 0939 0003 52 5 125 这个过程中，在145.905 usb收到ja6pl在叫cq，信号很强，59，比想象的要强。
我用的机器是icom-706mkiig，天线是双段八木，天线对准正东方，垂直极化架设。
有条件的弟兄们可以试试。