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PEM West B Measurement Characteristics
Species/
Parameter |
Investigator |
Technique |
Averageing Time |
Accuracy |
Nominal Precision |
Nominal Lod(pptv) |
| NOa |
J. Bradshaw and
S. SandHolm |
LIF |
1 s
10 s
100 s |
± 18%
± 18%
± 18% |
22% @ 100 pptv
7% @ 100 pptv
2% @ 100 pptv |
20
2
0.4 |
| NOyb |
J. Bradshaw and
S. SandHolm |
CC/LIF |
30 s |
± 20% |
20% @ 200 pptv |
36 |
| NO |
Y. Kondo |
Chemi Lum |
10 s |
12% @ 50 pptv |
7 pptv |
7 |
| NOy |
Y. Kondo |
CC/Chemi Lum |
10 s |
13% @ 500 pptv |
15 pptv |
14 |
| O3 |
G. Gregory |
Chemi Lum |
5 s |
3% or 2 ppbv |
2% or 1 ppbf |
1 ppbv |
| CO |
G.Sachse |
TDL |
5 s |
1% |
1 ppbv or 1% |
NA |
| CO2 |
B. Anderson |
IR absorption |
5 s |
± 0.25 ppm |
± 0.1 ppm |
NA |
| N2O |
G.Sachse |
TDL |
5 s |
1% |
0.5 ppbv |
NA |
| CH4 |
G.Sachse |
TDL |
5 s |
1% |
3 ppbv |
NA |
| Remote O3 |
E. Browell |
UV DIAL |
300 sc |
10% or 2 ppbv |
5% or 1 ppbv |
< 5 ppbv |
| Remote aerosol profile |
E. Browell |
UV DIAL (visible) |
1.8 sd |
1% |
1% |
NA |
| H2O |
J. Barrick |
Cryogenic chilled mirror hygro |
10 s |
± 0.5 ° C |
± 0.2 |
NA |
| H2O2 |
B. Heikes |
Grab samples/HPLC |
2.5 min |
10% > 50 pptv |
15 pptv |
12 |
| CH3OOH |
B. Heikes |
Grab samples/HPLC |
2.5 min |
15% > 50 pptv |
20 pptv |
12 |
| Condensation nuclei(CN) |
B. Anderson |
Butanol CN counter |
5s |
10% |
5% |
1/cm3 |
| Aerosol size (0.12-3.12 m) |
R. Pueschel |
Optical perticle counter |
15s |
10% |
5% |
0.1/cm3 |
| DMS |
A. Bandy and
D. Thornton |
GC/QMS |
3-4 min |
< 10% |
< 2 |
1 |
| SO2 |
A. Bandy and
D. Thornton |
GC/QMS |
3-4 min |
< 10% |
< 2 |
2 |
| PAN |
H. Singh |
GC/ECD |
150 s |
± 20% |
± 10% |
1 |
| PPN |
H. Singh |
GC/ECD |
150 s |
± 25% |
± 10% |
1 |
| C2Cl4 |
H. Singh |
GC/ECD |
150 s |
± 15% |
± 10%/1pptv |
0.5 |
| CH3COCH3 |
H. Singh |
GC/ECD |
130 s |
± 20% |
± 10% |
10 |
| CH3OH |
H. Singh |
GC/ECD |
130 s |
± 20% |
± 10% |
10 |
| C2H5OH |
H. Singh |
GC/ECD |
130 s |
± 25% |
± 10% |
10 |
| HNO3 |
R. Talbot |
Acqueous scrub./IC |
4-8 min |
35% |
25% |
5 |
| HCOOH |
R. Talbot |
Acqueous scrub./IC |
4-8 min |
20% |
15% |
10 |
| CH3COOH |
R. Talbot |
Acqueous scrub./IC |
4-8 min |
25% |
18% |
15 |
| Chloride |
R. Talbot |
Filter/IC |
10-20 min |
40% |
35% |
50 |
| Nitrate |
R. Talbot |
Filter/IC |
10-20 min |
20% |
10% |
5.0 |
| Oxalate |
R. Talbot |
Filter/IC |
10-20 min |
20% |
15% |
2.0 |
| Phosphate |
R. Talbot |
Filter/IC |
10-20 min |
25% |
25% |
5.0 |
| Sulfate |
R. Talbot |
Filter/IC |
10-20 min |
10% |
10% |
3.5 |
| Methylsulfonate |
R. Talbot |
Filter/IC |
10-20 min |
15% |
15% |
1.0 |
| Ammonium |
R. Talbot |
Filter/IC |
10-20 min |
15% |
15% |
20 |
| Sodium |
R. Talbot |
Filter/IC |
10-20 min |
40% |
35% |
60 |
| Potassium |
R. Talbot |
Filter/IC |
10-20 min |
20% |
20% |
25 |
| Magnesium |
R. Talbot |
Filter/IC |
10-20 min |
10% |
10% |
2.5 |
| Calcium |
R. Talbot |
Filter/IC |
10-20 min |
15 |
15% |
20 |
| Be-7 |
R. Talbot |
Filter/gama spectroscopy |
15-30 min |
15 |
15% |
50 fCi/scm |
| Pb-210 |
R. Talbot |
Filter/alpha spectroscopy |
15-30 min |
10 |
10% |
0.1 fCi/scm |
| CFC-12 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
2 |
0.7% |
0.1 |
| CFC-11 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
2 |
0.8% |
3 |
| CFC-113 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
2 |
1.4% |
3 |
| CFC-114 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1.5% |
1 |
| HCFC-22 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1.5% |
10 |
| H-1301 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
2% |
0.1 |
| H-1211 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
2% |
0.1 |
| CH3Cl |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1.2% |
100 |
| CH3Br |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
4% |
1 |
| CH3I |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% |
0.05 |
| CH3CCl3 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1% |
3 |
| CH2Cl2 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
5% |
2 |
| C2HCl3 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% |
0.01 |
| CCl4 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1% |
3 |
| C2Cl4 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
1.5% |
0.05 |
| Ethane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1% / 2 pptv |
3 |
| Ethene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
3 pptv |
3 |
| Propane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1% / 2 pptv |
3 |
| Propene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
3 pptv |
3 |
| i_butane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1% / 2 pptv |
3 |
| n_butane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1% / 2 pptv |
3 |
| Ethyne |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1% / 2 pptv |
3 |
| 1_butene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
3% / 3 pptv |
3 |
| I_pentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1% / 2 pptv |
5 |
| n_pentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1% / 2 pptv |
5 |
| 1_pentene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
3% / 3 pptv |
3 |
| n_hexane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
5 |
1% / 2 pptv |
3 |
| Isoprene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
3% / 3 pptv |
3 |
| Benzene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| Toluene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| t-2-Butene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| c-2-Butene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| 1,3-Butadiene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| 1-Butyne |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| 2-Butyne |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| n-Pentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| i-Pentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| Cyclopentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| 2-Methylpentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| Methylcyclopentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| 3-Methylpentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| Cyclohexane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| Cyclohexene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| n-Heptane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| 2,4-Dimethylpentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| Methylcylohexane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| Methylcylohexene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| 2,3,4-Trimethylpentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| 2,2,4-Trimethylpentane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| Ethylbenzene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| p-Xylene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| m-Xylene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| o-Xylene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| n-Nonane |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| p-Cymene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| 1,2,4-Trimethylbenzene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| 1,3,5-Trimethylbenzene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| Propylbenzene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| (-) a-Pinene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| (+) a-Pinene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| b-Penene,9 |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| d-Limonene |
S. Rowland and
D. Blake |
Grab sample/GG |
15-75 s |
10 |
5% / 3 pptv |
3 |
| UV Radiation / zenith and nadir |
J. Barrick |
Eppley radiometer |
1 s |
± 5% |
± 2% |
NA |
| Aircraft ephemeris data |
DC-8 aircraft |
DC-8 aircraft |
1 s |
10 s |
NA |
NA |
| J(NO2) zenith and nadir |
J. Barrick |
Hemispherical radiometer |
1 s |
± 5% |
± 1% |
NA |
| Surface temperature |
DC-8 aircraft |
PRT-5 |
1 s |
± 0.5 °C |
± 0.2°C |
-65° C to +55° C |
| Dew point |
DC-8 aircraft |
2 and 3 stage frost pt hygro |
1 - 30 s |
± 1.0° C |
± 0.3° C |
-75°C to +75°C |
| a | NO measurements archived for 1, 10, and 100's integration times |
| b | Investigators have included comments files in the archives stating
that their NOy values also reflect artifacts associated with conversion
of nonreactive nitrogen compounds. |
| c | Vertical averaging interval equal to 300 m (nadir) and 600 m (zenith);
horizontal averaging equla to 30 s or ~170 km. |
| d | Vertiacal sampling interval equal to 60 m; horizontal sampling
interval equal to 1.8 s or ~4 km |
| e | For total partical cound >100 particles in 10 s. |
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Curator:
NASA Official:
Last Updated 06/20/2014 |
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