CMDL aerosol data file
Format Specifications
[v2.31]
revisions
: TAK 930527 [1.0] draftTAK 930607 [1.2] added bm_ file
TAK 930609 [1.3] now comma separated. a__ file collapsed (no mvc's)
TAK 930622 [1.31] added ft_
TAK 930812 [1.4] added RH_sample and dp_neph_imp_hPa to end of am_ file.
TAK 931222 [1.41] added hourly average file specs
TAK 940224 [1.44] format of hourly file changed: DOY rounded to 2 decimal places, flags bit 4:1 reworded
TAK 940518 [1.5] adapted from WSA format document, updated naming conventions for clarity
TAK 940608 [1.6] added meteorological data file format specifications and naming convention
TAK 940715 [1.7] added fields 29-32 to am_ file.
TAK 940726 [1.8] revised "averaged" state files, added geometric means
TAK 941007 [1.9] Instances of Bap have been replaced with Bap_G
TAK 941130 [2.0] Add Bbsp_Bkg to nc_, redefine fields 8-11 in nm_. Due to TSI neph online.
TAK 950615 [2.1] added "lm_" filetype
JAO 960423 [2.2] added wind sector flag to FLAGS field
JAO 960703 [2.3] revised "me_" format
JAO 970505 [2.31] corrected minor errors in nm_ field descriptions
1. This document describes the format used to store aerosol data files for internal use at CMDL. There are three basic types of files: ambient aerosol, ambient meteorology, and sampling system state.
2. Separate data and header files are used for each type of data. The data fields for ambient data are identical for all stations (although truncated records may be used for stations with limited instrumentation), while different data fields may be used in the sampling system state files from the various stations. There may even be several different types of sampling system state files for some sites.
3. All data files are plain ASCII text, in comma-separated, fixed-length fields. The end of a record is denoted by a linefeed character (ASCII hex 10), which optionally may be preceded by a carriage return.
4. The first line in the header file identifies the parameter in each data field. Subsequent lines in the header files contain instrument and sampling system specifications (model/serial number, wavelengths, particle size ranges), along with a time-stamp indicating when the specifications became effective.
5. Basic aerosol data file record format: (stations with minimal instrumentation may truncate the records at the point where no additional data are available). Leading plus signs are replaced with a blank. This is the common format for the basic measurements obtained at a high time resolution. Missing value codes are always positive.
Naming Convention
File names consist of content, status, time codes, and station identifiers. The general format is:
<FC><s><timecode>.<STN>
<FC>
is a two character (with the exception of "volumes") File Code that indicates the general content.
|
File-Code |
General content |
|
a_ |
aerosol data |
|
ad |
aerosol digital data |
|
af |
aerosol filter data |
|
am |
aerosol monitor data |
|
b_ |
UPS data |
|
bm |
UPS monitor records |
|
ft |
Filter sample time records |
|
lm |
CLAP monitor records |
|
m_ |
general monitor info |
|
me |
ambient meteorological data |
|
nc |
neph calibration results |
|
ne |
neph state errors |
|
nm |
neph monitor data |
|
ns |
neph state data |
|
ss |
seconds and samples per sample period |
|
volumes |
Weekly cumulative filter volume records |
<s>
is a one character Status Code indicating the processing state of the file
|
Status-Code |
Data form |
|
_ |
as high-resolution (usually minute) data |
|
h |
as hourly averages |
|
d |
as daily averages |
|
m |
as monthly averages |
|
A |
"generic" average-formatted file |
|
t |
as 2-hour averages |
|
w |
as weekly averages |
<timecode>
is a string indicating time interval of contents
|
Timecode |
Data Time Interval |
|
X |
the most recently processed data (usually one day) |
|
cum |
"cumulative", variable interval |
|
head |
no time interval - this is a header file |
|
<yr>w<wk> |
one week of year <yr> beginning with week <wk> |
|
<yr>Q<q> |
one quarter of year <yr> beginning with quarter <q> |
|
<yr> |
year <yr> |
|
<yr>d<doy> |
one day of year <yr> beginning with DOY <doy> |
|
<yr>m<mn> |
one month of year <yr> beginning with month <mn> |
<STN>
is the three character station identifier (source of the data).
|
Station ID |
Station location |
|
bnd |
Bondville, Illinois, USA |
|
brw |
Barrow, Alaska, USA |
|
cpo |
Cheeka Peak, Washington, USA |
|
kpo |
K'puszta Observatory, Hungary |
|
lar |
Laramie, Wyoming, USA |
|
mlo |
Mauna Loa Observatory, Hawaii, USA |
|
nwr |
Ward, Colorado, USA |
|
p-3 |
P3 flight |
|
smo |
American Samoa |
|
spo |
South Pole Observatory |
|
wsa |
Sable Island, Nova Scotia, Canada |
Field Separator
All files currently have a comma as the field separator.
Field definition
Each File Code, Status Code combination has a specific format, as described below:
File:
a__<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info. |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
Flags |
0011 |
4-character code representing system status. |
%4s |
|
5 |
CN_control |
±9.999e-99 |
Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "control" inlet |
%10.3e |
|
6 |
CN_ambient |
±9.999e-99 |
Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet |
%10.3e |
|
7 |
Bap_G |
±9.999e-99 |
Aerosol light absorption coefficient (m-1), reported at ambient T&P, green channel. |
%10.3e |
|
8 |
Bsp_B |
±9.999e-99 |
Aerosol total light scattering coefficient (m-1), reported at ambient T&P, blue channel. |
%10.3e |
|
9 |
Bsp_G |
±9.999e-99 |
Aerosol total light scattering coefficient (m-1), reported at ambient T&P, green channel. |
%10.3e |
|
10 |
Bsp_R |
±9.999e-99 |
Aerosol total light scattering coefficient (m-1), reported at ambient T&P, red channel. |
%10.3e |
|
11 |
Bbsp_B |
±9.999e-99 |
Aerosol backwards-hemispheric light scattering coefficient (m-1), reported at ambient T&P, blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), reported at ambient T&P, near infrared channel. |
%10.3e |
|
12 |
Bbsp_G |
±9.999e-99 |
Aerosol backwards-hemispheric light scattering coefficient (m-1), reported at ambient T&P, green channel. |
%10.3e |
|
13 |
Bbsp_R |
±9.999e-99 |
Aerosol backwards-hemispheric light scattering coefficient (m-1), reported at ambient T&P, red channel. |
%10.3e |
|
14 |
Neph_RH |
±999 |
Relative Humidity (percent) inside nephelometer |
%4d |
|
15 |
Neph_T |
±99.9 |
Temperature (deg C) inside nephelometer |
%5.1f |
|
16 |
Neph_P |
±9999.9 |
Pressure (hPa) inside nephelometer |
%7.1f |
|
WS |
±99.9 |
local wind speed (m s-1) |
%5.1f |
|
|
18 |
WD |
±999 |
local wind direction (degrees True) |
%4d |
File:
ad_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
Time_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
Flags |
0011 |
4-character code representing system status. |
%4s |
|
5 |
Analyzers_ON |
0 |
1=analyzers ON, 0 = analyzers OFF |
%1d |
|
6 |
Active_Filter |
9 |
Valid filters are 1-8. If more than one filter is active at any one time, or if no filters are active, this field is set to zero. |
%1d |
|
7 |
Filter_Error |
999 |
0=no filter error Otherwise, this field contains the decimal value of a byte composed of the status of each filter. Each filter is a bit (1=filter on, 0=filter off), and are organized such that position 0 (LSB) = filter 1, position 1 = filter 2, up to position 7 respectively. |
%3d |
|
8 |
Unused1 |
0 |
unused digital input |
%1d |
|
9 |
Unused2 |
0 |
unused digital input |
%1d |
|
10 |
Unused3 |
0 |
unused digital input |
%1d |
|
11 |
Unused4 |
0 |
unused digital input |
%1d |
File:
af_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
F_Monitor |
(string of variable length) |
String indicating filter change, and cumulative filter volume information. This string may contain embedded commas, spaces and/or tabs. |
%s |
File:
am_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
Q_filter_lpm |
±99.99 |
Instantaneous air quantity through active filter (lpm) |
%6.2f |
|
5 |
Q_analyzer_lpm |
±99.99 |
Instantaneous air quantity through analyzer (lpm) |
%6.2f |
|
6 |
Q_3_lpm |
±99.99 |
Instantaneous air quantity through spare line |
%6.2f |
|
7 |
Q_4_lpm |
±99.99 |
Instantaneous air quantity through spare line |
%6.2f |
|
8 |
Q_bypass_lpm |
±99.99 |
Instantaneous air quantity through bypass line. |
%6.2f |
|
9 |
Q_CNdrier_lpm |
±99.99 |
Instantaneous air quantity through CN drier line. |
%6.2f |
|
10 |
Q_CN_lpm |
±99.99 |
Instantaneous air quantity through CN. |
%6.2f |
|
11 |
T_sample_degC |
±99.9 |
Temperature of current air sample. (deg C) |
%5.1f |
|
12 |
T_stack_degC |
±99.9 |
Temperature of air through stack. (deg C) |
%5.1f |
|
13 |
T_pumpbox_degC |
±99.9 |
Temperature inside pumpbox. (deg C) |
%5.1f |
|
14 |
T_heater_deg C |
±99.9 |
Temperature of heating tape. (deg C) |
%5.1f |
|
15 |
T_uMAC_degC |
±99.9 |
Temperature measured at mMAC panel. (deg C) |
%5.1f |
|
16 |
dP_Pitot_hPa |
±9.999 |
D Pressure across stack. (hPa) |
%6.3f |
|
17 |
dP_Purge_hPa |
±999.9 |
D Pressure across purge line. (hPa) |
%6.1f |
|
18 |
dP_F1_hPa |
±999.9 |
D Pressure across filter 1. (hPa) |
%6.1f |
|
19 |
dP_F2_hPa |
±999.9 |
D Pressure across filter 2. (hPa) |
%6.1f |
|
20 |
dP_F3_hPa |
±999.9 |
D Pressure across filter 3. (hPa) |
%6.1f |
|
21 |
dP_F4_hPa |
±999.9 |
D Pressure across filter 4. (hPa) |
%6.1f |
|
22 |
dP_F5_hPa |
±999.9 |
D Pressure across filter 5. (hPa) |
%6.1f |
|
23 |
dP_F6_hPa |
±999.9 |
D Pressure across filter 6. (hPa) |
%6.1f |
|
24 |
dP_F7_hPa |
±999.9 |
D Pressure across filter 7. (hPa) |
%6.1f |
|
25 |
dP_F8_hPa |
±999.9 |
D Pressure across filter 8. (hPa) |
%6.1f |
|
26 |
V_uMAC_V |
±9.999 |
Line voltage supplying power to mMAC. (volts) |
%6.3f |
|
27 |
RH_sample |
±999.9 |
Relative humidity of sample |
%6.1f |
|
28 |
dP_neph_im_hPa |
±999.9 |
D Pressure across neph impactor valve (hPa) |
%6.1f |
|
29 |
dP_spare1 |
±999.9 |
D Pressure spare1 (hPa) |
%6.1f |
|
30 |
dP_spare2 |
±999.9 |
D Pressure spare2 (hPa) |
%6.1f |
|
31 |
T_rack |
±99.9 |
Temperature inside the rack. (deg C) |
%5.1f |
|
32 |
P_station |
±9999.9 |
station pressure (hPa) |
%7.1f |
File:
b__<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
AC_Volts_In |
±999 |
AC Voltage supplying UPS |
%4d |
|
5 |
AC_Volts_Out |
±999 |
AC Voltage UPS is supplying as output |
%4d |
|
6 |
AC_Amps_Out |
±999.9 |
AC Amps UPS is currently supplying |
%6.1f |
|
7 |
Batt_DC_amp |
±999.9 |
DC Amps of UPS Battery |
%6.1f |
|
8 |
Batt_DC_V |
±999.9 |
DC Voltage of UPS Battery |
%6.1f |
|
9 |
Frequency |
±999.9 |
Frequency of line supplying UPS power (Hz) |
%6.1f |
|
10 |
UPS_Temp |
±999 |
Temperature inside UPS (deg C) |
%4d |
File:
bm_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
B_Monitor |
(string of variable length) |
String containing an event report generated by the UPS program. This string may contain embedded spaces. |
%s |
File:
ft_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
EndYear |
1993 |
End Year of sample period |
%4d |
|
3 |
EndTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) Endtime of sample period |
%9.5f |
|
4 |
StartYear |
1993 |
Start Year of sample period |
%4d |
|
5 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY StartTime of sample period |
%9.5f |
|
6 |
Cum_sec |
999999 |
Seconds elapsed during sampling period. |
%6d |
|
7 |
Filter |
9 |
Filter that is being sampled this period |
%1d |
File:
lm_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
Q_clap_slpm |
±9.99 |
CLAP flow rate |
%5.2f |
|
5 |
Tr |
9.999 |
Transmittance |
%5.3f |
|
6 |
I_sample |
9999999 |
Sample Intensity |
%7d |
|
7 |
I_ref |
9999999 |
Reference Intensity |
%7d |
File:
m__<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
M_Monitor |
(string of variable length) |
General system monitor notes and records. This string may contain embedded spaces and/or commas. |
%s |
File:
me_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code. |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
T_ambient |
±99.9 |
local temperature (deg C) |
%5.1f |
|
5 |
RH_ambient |
±999.9 |
local relative humidity (%) |
%6.1f |
|
6 |
P_ambient |
±9999.9 |
local pressure (hPa) |
%7.1f |
|
7 |
WS |
±99.9 |
local wind speed (m s-1) |
%5.1f |
|
WD |
±999 |
local wind direction (degrees True) |
%4d |
|
|
9 |
Visibility |
±999.9 |
local visibility (km) |
%6.1f |
|
10 |
Weather |
99 |
2-digit code for current weather, "TI" value Type Intensity 0 none -- 1 unknown very light 2 drizzle light 3 rain moderate 4 snow heavy 5 hail very heavy 6 freezing unknown 7 freezing drizzle 8 freezing rain |
%2d |
|
11 |
Cloud_base_m |
9999 |
height of lowest layer of cloud, in meters above ground level |
%4d |
|
12 |
Opacity_layer1 |
99 |
opacity of lowest layer of cloud, in 10th's |
%2d |
|
13 |
Opacity_total |
99 |
opacity of total cloud cover, in 10th's |
%2d |
|
14 |
Fog1 |
999 |
frequency of fog with LWC>0.05 g/m3 (%) |
%3d |
|
15 |
Fog2 |
999 |
frequency of fog with LWC>0.15 g/m3 (%) |
%3d |
|
16 |
Solar_flux |
9999 |
broadband solar irradiance, W/m2 |
%4d |
File:
nc_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
EndTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) of the end of the calibration. |
%9.5f |
|
4 |
Bsp_B_bkg |
±9.999e-99 |
Background blue (m-1) |
%10.3e |
|
5 |
Bsp_G_bkg |
±9.999e-99 |
Background green (m-1) |
%10.3e |
|
6 |
Bsp_R_bkg |
±9.999e-99 |
Background red (m-1) |
%10.3e |
|
7 |
Bbsp_B_bkg |
±9.999e-99 |
Backscatter Background blue (m-1) |
%10.3e |
|
8 |
Bbsp_G_bkg |
±9.999e-99 |
Backscatter Background green (m-1) |
%10.3e |
|
9 |
Bbsp_R_bkg |
±9.999e-99 |
Backscatter Background red (m-1) |
%10.3e |
File:
ne_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
State |
9999 |
Code representing nephelometer system state |
%4s |
|
5 |
Code |
9999999999999999 |
16 digit code indicating nephelometer status (4 digits on TSI nephelometers) |
%16s |
File:
nm_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
Press_hPa |
±9999.9 |
Pressure inside nephelometer. (hPa) |
%7.1f |
|
5 |
Temp_K |
±999.9 |
Temperature inside nephelometer (K) |
%5.1f |
|
6 |
Ref_green |
±9.999e-99 |
Nephelometer Green Reference (Hz) |
%10.3e |
|
7 |
Lamp_neph_V |
±9.999e-99 |
Voltage supplying nephelometer lamp (V) |
%10.3e |
|
8 |
Lamp_I_A |
±9.9 |
Current supplying nephelometer lamp (A) |
%4.1f |
|
9 |
Neph_RH |
±99.9 |
Relative Humidity (%) inside neph |
%5.1f |
|
10 |
T_inlet |
±999.9 |
Temperature of inlet air (K) |
%6.1f |
|
11 |
Aux_BNC_in |
999 |
BNC Auxiliary input (mV) |
%4d |
...before format v2.0, these fields are:
|
8 |
Bkg_blue_1_m |
±9.999e-99 |
Background blue (m-1) |
%10.3e |
|
9 |
Bkg_green_1_m |
±9.99e9-99 |
Background green (m-1) |
%10.3e |
|
10 |
Bkg_red_1_m |
±9.99e9-99 |
Background red (m-1) |
%10.3e |
File:
ns_<timecode>.<STN>
[same format as
ne_<timecode>.<STN>]
File:
ss_<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
seconds |
±999 |
Elapsed seconds this sampling period |
%4d |
|
5 |
samples |
±999 |
Number of samples taken this sampling period |
%4d |
File:
volumes<timecode>.<STN>
|
Col # |
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12345 |
DOY and FRACTIONAL_DOY (January 1 = 1) |
%9.5f |
|
4 |
Volume_info |
(string) |
Sampling volume information. (may contain embedded tabs, spaces, and/or commas) |
%s |
File:
a_[Ahmd]<timecode>.<STN> [average format]Averages reported in fields 5 through 22 are by default the geometric average, and a corresponding geometric standard deviation. If the corresponding "N" in field 44 through 58 is negative, the average and standard deviation for that measurement is arithmetic, not geometric.
|
Name |
Format and Missing Value Code (mvc) |
Description |
Scanf info |
|
|
1 |
Station_ID |
WSA |
3-character ID code |
%3s |
|
2 |
Year |
1993 |
Year |
%4d |
|
3 |
StartTime_UTC |
123.12 |
Integer part is Day of Year, |
%6.2f |
|
4 |
Flags |
0011 |
4-character code representing system status. |
%4s |
|
5 |
CN_control
|
±9.999e-99 |
Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "control" inlet |
%10.3e |
|
6 |
CN_ambient (default size) |
±9.999e-99 |
Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet |
%10.3e |
|
7 |
Bap_G (default size) |
±9.999e-99 |
Aerosol light absorption coefficient (m-1), reported at ambient T&P, green channel. |
%10.3e |
|
8 |
Bsp_B (default size) |
±9.999e-99 |
Aerosol total light scattering coefficient (m-1), reported at ambient T&P, blue channel. |
%10.3e |
|
9 |
Bsp_G (default size) |
±9.999e-99 |
Aerosol total light scattering coefficient (m-1), reported at ambient T&P, green channel. |
%10.3e |
|
10 |
Bsp_R (default size) |
±9.999e-99 |
Aerosol total light scattering coefficient (m-1), reported at ambient T&P, red channel. |
%10.3e |
|
11 |
Bbsp_B (default size) |
±9.999e-99 |
Aerosol backwards-hemispheric light scattering coefficient (m-1), reported at ambient T&P, blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), reported at ambient T&P, near infrared channel. |
%10.3e |
|
12 |
Bbsp_G (default size) |
±9.999e-99 |
Aerosol backwards-hemispheric light scattering coefficient (m-1), reported at ambient T&P, green channel. |
%10.3e |
|
13 |
Bbsp_R (default size) |
±9.999e-99 |
Aerosol backwards-hemispheric light scattering coefficient (m-1), reported at ambient T&P, red channel. |
%10.3e |
|
14 |
Neph_RH
|
±999 |
Relative Humidity (percent) inside nephelometer |
%4d |
|
15 |
CN_ambient, |
±9.999e-99 |
Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet |
%10.3e |
|
16 |
Bap_G, |
±9.999e-99 |
Aerosol light absorption coefficient (m-1), reported at ambient T&P, green channel. |
%10.3e |
|
17 |
Bsp_B, |
±9.999e-99 |
Aerosol total light scattering coefficient (m-1), reported at ambient T&P, blue channel. |
%10.3e |
|
18 |
Bsp_G, |
±9.999e-99 |
Aerosol total light scattering coefficient (m-1), reported at ambient T&P, green channel. |
%10.3e |
|
19 |
Bsp_R, |
±9.999e-99 |
Aerosol total light scattering coefficient (m-1), reported at ambient T&P, red channel. |
%10.3e |
|
20 |
Bbsp_B |
±9.999e-99 |
Aerosol backwards-hemispheric light scattering coefficient (m-1), reported at ambient T&P, blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), reported at ambient T&P, near infrared channel. |
%10.3e |
|
21 |
Bbsp_G, |
±9.999e-99 |
Aerosol backwards-hemispheric light scattering coefficient (m-1), reported at ambient T&P, green channel. |
%10.3e |
|
22 |
Bbsp_R, |
±9.999e-99 |
Aerosol backwards-hemispheric light scattering coefficient (m-1), reported at ambient T&P, red channel. |
%10.3e |
|
23 |
SD_CN_control |
±9.999e-99 |
Standard deviation of CN_control data this period |
%10.3e |
|
24 |
SD_CN_ambient |
±9.999e-99 |
Standard deviation of CN_ambient data this period |
%10.3e |
|
25 |
SD_Bap_G |
±9.999e-99 |
Standard deviation of Bap_G data this period |
%10.3e |
|
26 |
SD_Bsp_B |
±9.999e-99 |
Standard deviation of Bsp_B data this period |
%10.3e |
|
27 |
SD_Bsp_G |
±9.999e-99 |
Standard deviation of Bsp_G data this period |
%10.3e |
|
28 |
SD_Bsp_R |
±9.999e-99 |
Standard deviation of Bsp_R data this period |
%10.3e |
|
29 |
SD_Bbsp_B |
±9.999e-99 |
Standard deviation of Bbsp_B or Bsp_NIR data this period |
%10.3e |
|
30 |
SD_Bbsp_G |
±9.999e-99 |
Standard deviation of Bbsp_G data this period |
%10.3e |
|
31 |
SD_Bbsp_R |
±9.999e-99 |
Standard deviation of Bbsp_R data this period |
%10.3e |
|
32 |
SD_Neph_RH |
±999 |
Standard deviation of Neph_RH data this period |
%4d |
|
33 |
SD_CN_ambient, |
±9.999e-99 |
Standard deviation of CN_ambient (alternate size) data this period |
%10.3e |
|
34 |
SD_Bap, |
±9.999e-99 |
Standard deviation of Bap (alternate size) data this period |
%10.3e |
|
35 |
SD_Bsp_B, |
±9.999e-99 |
Standard deviation of Bsp_B (alternate size) data this period |
%10.3e |
|
36 |
SD_Bsp_G, |
±9.999e-99 |
Standard deviation of Bsp_G (alternate size) data this period |
%10.3e |
|
37 |
SD_Bsp_R, |
±9.999e-99 |
Standard deviation of Bsp_R (alternate size) data this period |
%10.3e |
|
38 |
SD_Bbsp_B |
±9.999e-99 |
Standard deviation of Bbsp_B or Bsp_NIR (alternate size) data this period |
%10.3e |
|
39 |
SD_Bbsp_G, |
±9.999e-99 |
Standard deviation of Bbsp_G (alternate size) data this period |
%10.3e |
|
40 |
SD_Bbsp_R, |
±9.999e-99 |
Standard deviation of Bbsp_R (alternate size) data this period |
%10.3e |
|
41 |
N_CN_control |
±99999 |
Number of data points used in computation |
%6d |
|
42 |
N_CN_ambient |
±99999 |
Number of data points used in computation |
%6d |
|
43 |
N_Bap_G |
±99999 |
Number of data points used in computation |
%6d |
|
44 |
N_Bsp_B |
±99999 |
Number of data points used in computation |
%6d |
|
45 |
N_Bsp_G |
±99999 |
Number of data points used in computation |
%6d |
|
46 |
N_Bsp_R |
±99999 |
Number of data points used in computation |
%6d |
|
47 |
N_Bbsp_B |
±99999 |
Number of data points used in computation |
%6d |
|
48 |
N_Bbsp_G |
±99999 |
Number of data points used in computation |
%6d |
|
49 |
N_Bbsp_R |
±99999 |
Number of data points used in computation |
%6d |
|
50 |
N_Neph_RH |
±99999 |
Number of data points used in computation |
%6d |
|
51 |
N_CN_ambient, |
±99999 |
Number of data points used in computation |
%6d |
|
52 |
N_Bap_G, |
±99999 |
Number of data points used in computation |
%6d |
|
53 |
N_Bsp_B, |
±99999 |
Number of data points used in computation |
%6d |
|
54 |
N_Bsp_G, |
±99999 |
Number of data points used in computation |
%6d |
|
55 |
N_Bsp_R, |
±99999 |
Number of data points used in computation |
%6d |
|
56 |
N_Bbsp_B |
±99999 |
Number of data points used in computation |
%6d |
|
57 |
N_Bbsp_G, |
±99999 |
Number of data points used in computation |
%6d |
|
58 |
N_Bbsp_R, |
±99999 |
Number of data points used in computation |
%6d |
FLAGS Field Specification
|
Char./ |
Bit clear |
||
|
1 |
Not used |
"0" used as placeholder |
|
|
2 |
Not used |
"0" used as placeholder |
|
|
3 |
Sampling configuration, 4-bit hex digit (0-F) |
|
|
|
3:3 |
Not used |
Always |
|
|
3:2 |
Not used |
Always |
|
|
3:1 |
Not used |
Always |
|
|
3:0 |
Analyzer impactor state |
Alternate size range |
Default size range |
|
4 |
Sampling conditions, |
|
|
|
4:3 |
Not used |
Always |
|
|
4:2 |
Wind sector control |
Wind speed or direction indicate local pollution is likely |
Local pollution absent |
|
4:1 |
Manual contamination check |
Local pollution present |
Local pollution absent |
|
4:0 |
Automatic contamination controller |
Local pollution present |
Local pollution absent |
Characters 3 and 4 should never be greater than "9" to ensure program compatibility.
The default size range is defined to be the total from 0-10
mm. The alternate size range is from 0-1mm.