The NOAA POES Hemispheric Power Data lists provide information about the 
estimated power in gigawatts deposited in the polar regions by energetic 
particles during transits over the poles by the NOAA POES (formerly called 
TIROS) satellites.  

The files are organized by year, and each line contains the date and 
universal time at the center of the polar pass.  Data are collected from 45 
degrees poleward to 45 degrees equatorward.  Other information provided in each 
record (line of the file) includes the NOAA POES satellite number, the 
hemisphere, an activity level index (1..10) related to the power in gigawatts, 
and a "normalizing factor", usually in the neighborhood of 1.0.

The latter can serve as an indicator of the reliability of the power and 
activity level data--values of the normalizing factor which depart very much 
from 1.0 are indicators of the data being not very reliable.  This would occur 
when the path of the satellite during the measurement does not pass through a 
region which provides a good statistical base of data by which the power 
calculation can be made.

Power data was not collected for the years 1989 and 1990.  Otherwise, there are 
files for all the years from 1978 through the current year. The format of the
files changes in 2007. Both formats are given below.

***********
Format:prior to 2007
***********

The first line of data in each file contains the four-digit year of the data.
Each following line is formatted as in this example--please note the Fortran-
style format listed below. There is no space between Day of year and UT hour
and minute:

NOAA-12(S)  10031     9.0  4    .914

A7    NOAA POES Satellite number
A3    (S) or (N) - hemisphere
I3    Day of year
I4    UT hour and minute
F8.1  Estimated Hemispheric Power in gigawatts
I3    Hemispheric Power Index (activity level)
F8.3  Normalizing factor

********************************************************************************
Sample NOAA POES Power File Listing
********************************************************************************
1996
NOAA-12(S)  10031     9.0  4    .914
NOAA-14(N)  10039     9.1  4   1.103
NOAA-12(N)  10121     7.4  4   1.019
NOAA-14(S)  10131     1.3  1   2.033
NOAA-12(S)  10213     5.8  3   1.030
NOAA-14(N)  10223     5.2  3   1.264
NOAA-12(N)  10303     4.3  3   2.033
NOAA-14(S)  10315    13.3  5   1.187
NOAA-12(S)  10355     4.2  3   1.476
NOAA-14(N)  10407     3.8  2   1.086
NOAA-12(N)  10447     2.7  2   2.415
NOAA-14(S)  10457     5.3  3   1.209

********************************************************************************

******************
Format after 2007
*****************

2006-09-05 00:54:25 NOAA-16 (S)  7  29.67    0.82

Where the paramaters are defined as:

A19 	Date and UT at the center of the polar pass as YYYY-MM-DD hh:mm:ss
1X	(space)
A7	NOAA POES Satellite number
1X	(space)
A3	(S) or (N) - hemisphere
I3	Hemispheric Power Index (activity level)
F7.2	Estimated Hemispheric Power in gigawatts
F7.2	Normalizing factor

SAMPLE pwr_1day file

2007-10-11 00:32:00 NOAA-17 (S)  3   5.10   1.06
2007-10-11 00:38:00 NOAA-18 (S)  1   1.70   3.32
2007-10-11 00:51:00 NOAA-15 (S)  1   2.40   1.46
2007-10-11 00:54:00 METP-02 (S)  3   4.90   0.98
2007-10-11 01:22:00 NOAA-17 (N)  2   2.50   1.24
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center.