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filter NWS

 

How should go about filtering NWS products to just a radius around me? Currently I am IG->RF all EAX products, but i want to filter all EAX products within 50km or so of me.?

IGFILTER ?-b/AC0OK-10/KE0HDU*/CHILLI e/AE5PL-WX b/EAX* ?r/40.070/-93.611/120
FILTER IG 0 ( r/40.070/-93.611/120 & b/METAR-2 ) | ( b/KB0RPJ-*/SNZM7/TTZM7/CHZM7/LAMO7/EAX*/MTRK*/MOA*/KLWD & ! b/AC0OK*/KE0HDU*/CHILLI ) | ( r/40.070/-93.611/41 & ! b/AC0OK-10/CHILLI )?
#

my current filters
 

That is a very interesting question.
It sounds like we might need a new type of filter based on the weather region codes.

Could you provide a few examples of the packets you are seeing?

73,
John WB2OSZ
Lynn Deffenbaugh
 

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The problem is going to be that some of the weather packets are messages without coordinates.?? As a matter of fact, I'm not sure posits are even generated for most packets.?? Maybe just the Multi-Line packets actually have coordinates in order to draw the shapes.

The full specifications of the NWS APRS weather packets can be found at:

and


Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32




On 4/30/2024 7:47 PM, WB2OSZ wrote:

That is a very interesting question.
It sounds like we might need a new type of filter based on the weather region codes.

Could you provide a few examples of the packets you are seeing?

73,
John WB2OSZ


Lynn Deffenbaugh
 

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I should have also suggested that some sort of range filtering might be possible if you actually loaded up the referenced zone and/or county shapefiles, parsed the received packets to identify which zone(s) and/or county(ies) are affected and then do an area match to find if any of the selected shapes is in the desired range.



Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32


On 4/30/2024 9:02 PM, Lynn Deffenbaugh wrote:

The problem is going to be that some of the weather packets are messages without coordinates.?? As a matter of fact, I'm not sure posits are even generated for most packets.?? Maybe just the Multi-Line packets actually have coordinates in order to draw the shapes.

The full specifications of the NWS APRS weather packets can be found at:

and


Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32




On 4/30/2024 7:47 PM, WB2OSZ wrote:
That is a very interesting question.
It sounds like we might need a new type of filter based on the weather region codes.

Could you provide a few examples of the packets you are seeing?

73,
John WB2OSZ


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