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[aprssig] [ui-view] APRS Radiation sensor

Bob Bruninga bruninga at usna.edu
Thu Mar 24 14:15:40 UTC 2011


Good points...

>From: Lynn W. Deffenbaugh (Mr) [mailto:ldeffenb at homeside.to] 
> Ok, I've seen the new Xnns weather parameter for radiation, 
> and I've noted the previously existing requirement that not 
> only weather station symbols be checked for weather, but 
> also water and flooding symbols may contain weather.
>
> I've also noted discussion elsewhere in the thread that 
> overlay R on symbol H be used for a "Radiation Detector".
>
> Merging these two things together, should an RH symbol also 
> be checked for the presence of weather data, possibly to 
> include the X, or is the RH for something completely different.  
> If RH symbol packets should be scanned for weather data, 
> then should it be specified in weather-new.txt for completeness?

You have raised good points, and I think it was Julian also raised this
point.

OK, how about this.  We have defined Xnnn as a field in weather reports.
Thus a WX symbol is required according to the spec.  Thus, this is a sensor.
On the map it looks just like any other weather station but its radiation
sensor can be found and parsed.

The RH hazard symbol is mostly for an OBJECT to highlight the location of a
"Hazardous condition".

Bob, Wb4APR

On 3/23/2011 3:27 PM, Bob Bruninga wrote:
> I  updated the APRS12 addendum to this standard for Radiation.
> http://aprs.org/aprs12/weather-new.txt
>
> Bob, Wb4APR
>
> -----Original Message-----
> From: ui-view at yahoogroups.com [mailto:ui-view at yahoogroups.com] On Behalf
Of
> Bob Bruninga
> Sent: Tuesday, March 22, 2011 3:28 PM
> To: 'TAPR APRS Mailing List'
> Cc: 'IZ6RDB'; 'Guido Trentalancia'; jjesson at voyager.net; 'sylvainfaust';
> ui-view at yahoogroups.com
> Subject: [ui-view] APRS Radiation sensor
>
> How about this for Radiation Telemetry:
>
> - 3 digits.  Either in a WX report or in a Telemetry channel.
> - In a weather report the identifying byte would be "X".
> - So X123 would be 12 times 10^3rd nanoseverts
>
> Using Tapio's idea (below) of 2 digits of precision and one digit of
decade.
>
> Bob, WB4APR
>
> -----Original Message-----
> From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
> Of Tapio Sokura
> Sent: Thursday, March 17, 2011 4:40 PM
> To: TAPR APRS Mailing List
> Subject: Re: [aprssig] Clarification of APRS weather station data flow.
>
> Hi,
>
> On 03/17/2011 05:29 AM, Scott Miller wrote:
>> Also, unsurprisingly, there's been a big surge of interest in Geiger
>> counter interfacing.  Bob, can we get a standard for sending ionizing
>> radiation levels in weather reports?
> I'm not Bob, but I'm sticking my spoon into the soup anyway after a
> little IRC chatting.. so here goes: Anyone who's familiar with radiation
> levels knows they can hugely vary in scale. So using a plain, say
> three-digit, number isn't going to scale very well (i.e. 001 = 1 uSv/h,
> 999 = 999 uSv/h).
>
> I'm suggesting the following: three digits, where the first two are the
> significant digits (mantissa) and the last one is an exponent. Base unit
> could be nSv/h, nanosieverts per hour (Sievert is the SI-unit for
> ionizing radiation dose equivalent).
>
> If abc represents the digits, the resulting radiation level would be
> calculated using the formula ab * 10^c nSv/h. A few examples:
>
> 000 = special case for "reading unavailable"
> 010 = special (theoretical) case of 1 nSv/h or under
> 020 = 2 nSv/h
> 150 = 15 nSv/h
> 990 = 99 nSv/h
> 321 = 320 nSv/h
> 123 = 12 uSv/h
> 654 = 650 uSv/h
> 456 = 45 mSv/h
> 987 = 980 mSv/h
> 989 = 98 Sv/h
> 999 = special case for 99 Sv/h or over
>
> So that's the digit part sorted out, now we just need a letter
> identifier/tag for it..
>
>     Tapio
>
> _______________________________________________





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