TRANSMISSOMETER DATA README FILE - NOVEMBER 2003
This CD contains level-1 hourly transmissometer-based visibility data from the 17
transmissometer sites (listed below) in the IMPROVE visibility monitoring network. The data
included are from 1/1/02 through 12/31/02. As with all level-1 transmissometer data, careful
attention should be paid to the validity interference codes, which indicate a variety of
uncertainties in the processed measurements.
DATA FILE FORMAT KEY
The data file format key for all transmissometer data files is included in this folder and is
available in:



MS Word format
Adobe Acrobat format
Text only
(transkeyNov2003.doc)
(transkeyNov2003.pdf)
(transkeyNov2003.txt)
FILE NAMING CONVENTIONS
Quarterly data files are named XXXXX_T1W.YYS, where XXXXX is the site abbreviation, YY
is the year, and S is the calendar season:
1.
2.
3.
4.
=
=
=
=
Winter
Spring
Summer
Fall
(January, February, and March)
(April, May, and June)
(July, August, and September)
(October, November, and December)
For example, CANY1_T1W.021 contains Canyonlands National Park transmissometer data for
the period January 1, 2002 through March 31, 2002. The average size of a quarterly
transmissometer file is 202 Kb.
SITE SPECIFIC NOTES FOR TRANSMISSOMETER DATA (1/1/2002 – 12/31/2002)
BADL1 - extinction readings possibly too low and not matching actual conditions with lamp#
2482 from 1/22/02 – 3/26/02.
BIBE1 – extinction readings possibly too low and not matching actual conditions with lamp#
2184 from 3/19/02 – 6/4/02 *.
*BIBE1 and BIBE2 readings sometimes tracking and sometimes not tracking from
1/23/02 – 6/12/02; reason unknown.
GRBA1 – extinction readings possibly too low and not matching actual conditions with lamp#’s
2545, 2546, 2547, & 2548 from 1/1/02 – 8/7/02.
SITE SPECIFIC NOTES FOR TRANSMISSOMETER DATA (1/1/2002 – 12/31/2002)
GRCA1 - extinction readings possibly too low and not matching actual conditions with lamp#
2486 from 2/11/02 – 2/13/02, with lamp# 2487 from 2/13/02 – 4/16/02, with lamp# 2654 from
8/28/02 – 9/3/02, and with lamp# 2655 from 9/3/02 – 10/25/02.
PEFO2 - extinction readings possibly too low and not matching actual conditions with lamp#
2558 from 11/5/02 – 12/16/02.
SAGO1 - extinction readings possibly too low and not matching actual conditions with lamp#
2519 from 1/31/02 – 4/23/02.
TRANSMISSOMETER SITES IN THE IMPROVE VISIBILITY MONITORING
NETWORK:
1) BADL1 – Badlands National Park, SD
2) BAND1 – Bandelier National Monument, NM
3) BIBE1 – Big Bend National Park, TX
4) BIBE2 – Big Bend National Park (Grapevine Hills), TX
5) BRID1 – Bridger Wilderness, WY
6) CANY1 – Canyonlands National Park, UT
7) CHIR3 – Chiricahua National Monument, AZ
8) GLAC1 – Glacier National Park, MT
9) GRBA1 – Great Basin National Park, NV
10) GRCA1 – Grand Canyon National Park (South Rim), AZ
11) GRCW1 – Grand Canyon National Park (In-Canyon), AZ
12) GUMO1 – Guadalupe Mountains National Park, TX
13) PEFO2 – Petrified Forest National Park, AZ
14) ROMO2 – Rocky Mountain National Park, CO
15) SAGO1 – San Gorgonio Wilderness, CA
16) SHEN2 – Shenandoah National Park, VA
17) YOSE2 – Yosemite National Park, CA