I've just started injecting an object into APRS-IS called ISS from
KJ4ERJ-15. This object contains a MultiLine description of the
approximate RF footprint of the International Space Station which is
displayed perfectly on APRSISCE/32. Given that xastir is the only other
client advertised at supporting the MultiLine format (documented at
http://www.aprs-is.net/WX/MultilineProtocol.aspx), I was wondering if
someone could let me know what it looks like there.
You should be able to receive the two-minute updates for the ISS object
with an o/ISS filter.
Here's a few sample packets:
KJ4ERJ-15>APZTLE,TCPIP*:;ISS *035328h0354.08N\14948.70WS
}k1izNw]okctUyGy8t-j%]"N%?-28(G#U#c(o1w?zN{!w>A!
KJ4ERJ-15>APZTLE,TCPIP*:;ISS *035348h0455.72N\14904.89WS
}k1izNw^okcuTyFy8t-j%]#N%?-28(F#T#c'o1w>zN{!wN:!
KJ4ERJ-15>APZTLE,TCPIP*:;ISS *035408h0557.30N\14820.93WS
}k1izNw^okcuTyFy8t-j%]"N%?-28(F#T#c'o1w>zN{!wB>!
KJ4ERJ-15>APZTLE,TCPIP*:;ISS *035607h1201.65N\14354.53WS
}k1iyNv^nlbuSzFx8s-i&\#N&@-38)F$S"b'n0v>yN{!w:g!
KJ4ERJ-15>APZTLE,TCPIP*:;ISS *035806h1800.30N\13914.72WS
}k1jwNt_lm`vRzEx8r.h'\%N'@.48*E$R"`&l/t=wN{!wML!
KJ4ERJ-15>APZTLE,TCPIP*:;ISS *040005h2349.83N\13413.70WS
}k1jvNs`kn_wQzEw9q/g)[&N)A/59+E%Q"_%k.s<vN{!woO!
By transmitting the satellite's current position and estimated
footprint, it is globally applicable. If your station ends up in the
circle, then the satellite should be in range. The bearing and distance
from your station can assist in estimating the Azimuth and Elevation for
reception. This is obviously not going to replace any dedicated
satellite tracking software, but there's more to come in this area as
well for us APRS users.
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
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