[Land-speed] Fw: question

[Glen Barrett]

Heres the answer to the ST that should be SP from the guy that programmed the
system.
Glen
----- Original Message -----
From: Rice, James
To: Glen Barrett
Sent: Tuesday, August 28, 2007 11:58 AM
Subject: RE: question


That was a miss-abbreviation that should have been SP, (it was corrected on
some timing slips, towards the end of the week).  SP stands for Station
Pressure, which means un-corrected barometric pressure.  Barometers measure
air pressure, but since air pressure also varies by altitude, they are
corrected to read equivalent sea level values.   Station Pressure is the
actual, un-corrected value the instrument read.  Station Pressure is needed to
calculate the density altitude that is also printed on the timing slip.

James Rice
ChronoLogic Timing
  -----Original Message-----
  From: Glen Barrett [mailto:speedtimer at beyondbb.com]
  Sent: Tuesday, August 28, 2007 10:38 AM
  To: Rice, James
  Subject: question


  What is ST on the time slips, they are asking on the net.
  Glen