Cumulus Support

meadowlark wrote:Is this same algorithm for determining altimiter adjustment to CWOP the same for the Oregon Scientific?

Yes - basically it takes the 'station' pressure and corrects it by inserting that and your altitude into the standard formula. It does rather assume that your station barometer is reasonably accurate and the altitude that you have entered into Cumulus is accurate.

You can use this page to check the values that are being sent by Cumulus:

http://www.hochwarth.com/misc/AviationCalculator.html

"Altimeter pressure" as required by CWOP is the same as "QNH" on that page.