[hfsig] hfsig Digest, Vol 29, Issue 4

[Douglas Quagliana]

Bob writes:
This requires a lot of bits that never change unless the DX is huge.

Wellll... 
You could get away with not sending those bits if you made an assumption based on the callsign. There has to be a callsign, right? So if the callsign prefix is K, W, N or A then assume its the US set of grids and just send the necessary bits for the exact location. 
You need a table for each ITU prefix and the assumed set of grids. 

Want it all? Even that DX?  Have a one bit flag. Set one way the flag says to assume a set of grids based on ITU callsign prefix. Set the other way, make no assumptions and all location bits need to be present. 

73,
Douglas KA2UPW/5

> On Oct 11, 2016, at 3:13 PM, bob on hfsig-request at tapr.org wrote:
> 
> This requires a lot
> of bits that never change unless the DX is huge.