And keep in mind that this is the standard lapse rate. It can vary. Heck, you can actually have higher temperatures in a layer above. Temperature inversion. Traps pollution down low. But, for the purposes of this thread, standard lapse rate should be fine.
Ghery Pettit From: [email protected] [mailto:[email protected]] On Behalf Of John Woodgate Sent: Friday, September 07, 2007 10:03 AM To: [email protected] Subject: Re: Max. ambient temperature In message <[email protected]>, dated Fri, 7 Sep 2007, Ralph McDiarmid <[email protected]> writes: >One hopes that the 4C difference would be accounted for in the >temperature limits imposed by most standards. If I found a spot within >4C of a limit, I'd take a harder look at things anyway. > >If it's 35C at MSL, what's the air temperature at 2000m? Perhaps it's >down by more than 4C. From http://en.wikipedia.org/wiki/Lapse_rate it decreases at 6.5 C per 1000 m. Note that the 'official' lapse rate is the NEGATIVE of the raw figure. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk There are benefits from being irrational - just ask the square root of 2. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
