On 18 Oct 2006 01:47:36 -0700, "jaycee"
wrote:

|
|crb wrote:
| Andrew Gabriel wrote:
| No, I get believable readings from clouds, typically -40 to -50,
| which agrees with what aircraft report as the outside temperature.
|
|
| Clouds at -40 to -50? - I don't think so. You have to go to around
| 30,000 feet or above to get down to those temperatures.
|
| CRB
|
|Sea level standard is ISA 15 deg. C and a lapse rate of 1. 98 deg. per
|1000' you can work it out for yourself? Although in different parts of
|the world the altitude temp does not always follow the formulae.

I would believe -40C to -50C the IR thermometer might not *see* the clouds,
but something else far higher.
--
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