请简单介绍一下iss数字中继，可以吗？

这是谁干的

http://www.issfanclub.com/status/?mode=packet

amateur radio status
packet reports
post a new report utc reported by status remarks

9:07z
sep 12 2007 i7pqd active ottimi segnali dalla iss in modo packet/aprs ne sud italia alle ore 09.00 utc 73' a tutti om de michele in maglie (lecce)

6:01z
sep 12 2007 6equj5 active packets received again in scotland on 145.825 signal = good readable. steven.

4:33z
sep 12 2007 6equj5 active hi,packets heard in scotland on 145.825. good signal. first i have heard anything from the iss in months. :)

4:16z
sep 12 2007 py5rx active active over lisbon. post 5 msg on pms. work's fine! amazing! 73 fabiano

3:50z
sep 12 2007 anonymous active good pass over santiago, chile. digipeated again on 145.825 (ce3sna-7). also heard lu8yn digiptd beacon! welcome back ariss packet!

2:22z
sep 12 2007 ce3soc active very strong over chile tm-733a opek uvs-200 dual band 02:08 rs0iss-11>lu8yy>disc,p 02:08 rs0iss-11>lu8yy>disc,p 02:08 cetra/rs0iss-4*>lu8yy>rr0,p 02:08 rs0iss-11>lu8yy>disc,p 02:08 ce3soc>rs0iss-4>sabm,p

刚刚11:41-11:45bjt
iss通过南京上空145.825 抄收到3次packet的信号，信号59.
感觉好像是间隔2分钟一次。

是的，不错的信号。

iss的bbs也开始工作了

08:53-08:57 bjt 145.825收来自国际空间站的信号，信号59.
确认为每次packet的信号间隔为2分钟。
在仰角为3度的时候依然能清楚的抄收到信号。

下次经过南京的上空为10:25-10:34，几乎过顶。将覆盖中国大部分地区。

这一次过顶啥也没听到，关了？

bg6agb和我也是，刚才啥都没听到

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[表情] [表情] [表情]

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08:53-08:57 bjt 145.825收来自国际空间站的信号，信号59.
确认为每次packet的信号间隔为2分钟。
在仰角为3度的时候依然能清楚的抄收到信号。
下次经过南京的上空为10:25-10:34，几乎过顶。将覆盖中国大部分地区。

'
空间站不是800下来吗?怎变了825?825是usb还是fm?

'

这一次过顶啥也没听到，关了？

'
昨这一次，我在户外用c150和本身的橡胶天线听到一声。
从 http://www.issfanclub.com/ 网站上看，aprs digi仍开着有packet信号下来。

'

空间站不是800下来吗?怎变了825?825是usb还是fm?

'
以下是空间站的频率和模式信息，是fm模式。
目前aprs digi模式开着，145.825每隔两分钟发送一次数据包信号。我们目前在用的2m设备几乎都能收到。

frequency information

mode v/v crew contact (regions 2 & 3): semi-operational
uplink: 144.4900 mhz fm
downlink 145.8000 mhz fm

mode v/v crew contact (region 1): semi-operational
uplink: 145.2000 mhz fm
downlink 145.8000 mhz fm

mode v/v packet (worldwide): semi-operational
uplink: 145.9900 mhz afsk 1200 bps
downlink 145.8000 mhz afsk 1200 bps

mode v aprs (worldwide aprs digipeater): operational
simplex: 145.8250 mhz fm 1200 bps
downlink 145.8250 mhz fm 1200 bps

mode v imaging: semi-operational
downlink 144.4900 mhz sstv

mode u/v (b) fm voice repeater (worldwide): semi-operational
uplink: 437.8000 mhz fm
downlink 145.8000 mhz fm

'

以下是空间站的频率和模式信息，是fm模式。
目前aprs digi模式开着，145.825每隔两分钟发送一次数据包信号。我们目前在用的2m设备几乎都能收到。
frequency information
mode v/v crew contact (regions 2 & 3): semi-operational
uplink: 144.4900 mhz fm
downlink 145.8000 mhz fm
mode v/v crew contact (region 1): semi-operational
uplink: 145.2000 mhz fm
downlink 145.8000 mhz fm
mode v/v packet (worldwide): semi-operational
uplink: 145.9900 mhz afsk 1200 bps
downlink 145.8000 mhz afsk 1200 bps
mode v aprs (worldwide aprs digipeater): operational
simplex: 145.8250 mhz fm 1200 bps
downlink 145.8250 mhz fm 1200 bps
mode v imaging: semi-operational
downlink 144.4900 mhz sstv
mode u/v (b) fm voice repeater (worldwide): semi-operational
uplink: 437.8000 mhz fm
downlink 145.8000 mhz fm

'
谢谢你!

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谢谢你!

'
不客气！但来自http://www.issfanclub.com/报告看又停了。

15:40z
sep 17 2007 py4mab not active 72 elevation degree 15:30 utc. nothing heard over south america. mauricio beraldo py4mab brazil

15:30z
sep 17 2007 kb8pxv not active all quiet over missouri on 145.825

10:48z
sep 17 2007 py5rx not active nothing heard again over europe. i think the radio it's already configured to ariss qso today at 13:39z 73 fabiano

9:20z
sep 17 2007 py5rx not active sorry, nothing heard over europe 09:18z

iss业余电台临时关闭可能的原因。

radio off for progress undock
n5vho – september 18, 2007 – 02:12
the radio should be off for the progress undock set for tomorrow.

kenneth - n5vho
http://spaceflight.nasa.gov/station/reference/radio/
http://www.clarc.org/jprod/component/option,com_weblinks/catid,14/itemid,23/

4:08z
sep 21 2007 sangat active p1 20-sep-07 1013 e20zfd>rs0iss-4*>aprs: hello all this is e20zfd from bkk thailand the time shown is mst copied at 9m2rpn sangat, 9m2ss

1:55z
sep 21 2007 vk4fc active good packet signal over queensland australia 145.825mhz

1:20z
sep 21 2007 py5rx active over europe. good signal. 73 fabiano

0:20z
sep 21 2007 vk4fc active 2007-sep-21 0030 utc rs0iss-4>cq,sgate,vk4fc,i: >ariss - international space station (bbs/aprs on)

14:58z
sep 20 2007 n5vho active 1450 utc packet active over n. america on 145.825 simplex

13:23z
sep 20 2007 n5vho active 1315 utc packet active over n. america on 145.825 simplex

4:05z
sep 20 2007 hb3ynv active nice signal - ariss - international space station (bbs/aprs on)

2:58z
sep 20 2007 e20zfd active very good signal over thailand, 73 karn e20zfd

packet怎么解开啊？