[amsat-bb] AIS On The ISS

Sun Sep 7 19:05:19 UTC 2014

The thought never even occurred to me that AIS might have it's own dedicated radio downlink, I assumed AIS like other ISS data would go via the broadband Internet connection. A dedicated downlink would require the creation and maintenance of a ground-station network.

The eoPortal has a wealth of information on the AIS experiment and mentions the ARISS involvement, see https://directory.eoportal.org/web/eoportal/satellite-missions/i/iss-colais

I could see no mention of a dedicated transmitter, the article says: "10 days of near-real-time data show that 80% of the messages collected 
in the period could be delivered through the station's communications 
network with data latency significantly less than 1 hour."

To me that implies it's going via the Internet link which I think may be KU-Band via Geostationary satellites ?
http://www.universetoday.com/108215/compare-the-space-stations-internet-speed-with-yours/

73 Trevor M5AKA

On Sunday, 7 September 2014, 16:10, Nitin Muttin <vu3tyg at yahoo.co.in> wrote:

IthinkthedownlinkfrequencyoftheAISpayloadontheISS  couldbedifferentfromtheterrestrialfreq.
73
Nitin(vu3tyg)
Sent from Yahoo Mail on Android
From:"M5AKA" <m5aka at yahoo.co.uk>
Date:Sun, Sep 7, 2014 at 20:30
Subject:Re: [amsat-bb] AIS On The ISS

Dave, AIS is receive only, around 162 MHz.

73 Trevor M5AKA

On Sunday, 7 September 2014, 14:35, Dave Marthouse <dmarthouse at gmail.com> wrote:

In this week's Amsat News there was a story on the AIS experiment on the 
ISS.  What's it's downlink frequency and what form of
 modulation is used?

-- 
Dave Marthouse N2AAM
dmarthouse at gmail.com

_______________________________________________
Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb