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GTE: Table 1a and 1b NRA-97-MTPE-13

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Table 1a Measurement Requirements for the DC-8 Instrumentation
Species/Parameter Priority Detection Limit Time Resolution Time Resolution
5 x LOD
O3 (in situ)
1* 3 ppbv
[1 ppbv] 		30 sec
[1 sec] 		5 sec
[1 sec]
NO 1 3 pptv
[1 pptv] 		1 min
[10 sec] 		10 sec
[10 sec]
H2O 1* 3 ppmv
1 min
[1 sec] 		10 sec
[1 sec]
CO 1* 5 ppbv 1 min
(1 sec) 		10 sec
(1 sec)
UV Radiometer (+)
(zenth & nadir) 		1* 1 watt/m2 10 sec 10 sec
Atmospheric
State Parameters 		1 aircraft standard 1 sec 1 sec
remote ozone
(nadir and zenith) 		1 5 ppbv Z < 500 m
X<60 km 		Z<500 m
X<60 km
remote aerosol (nadir and zenith) 1 scattering ratio .02 @ 600 nm Z < 60 m
X<500 m 		Z < 60 m
X<500 m
PAN 2 5 pptv 5 min 5 min
HNO3 2 5 pptv 5 min 2 min
j(O1 D)
(nadir & zenith) 		2 1 X 10-6 /s 30 sec 30 sec
H2 O2 2 10 pptv 5 min 5 min
CH3 OOH 2 10 pptv 5 min 5 min
J(NO2 )
(nadir & zenith) 		2 1 X 10-4 /s 30 sec 30 sec
NMHC's (C2 -C6 ) 2 20 pptC 5 min 5 min
Halocarbons 2 2 pptv 5 min 5 min
OH 2 0.03 pptv 10 min 10 min
HO2 2 0.4 pptv 10 min 2 min
acetone 2 50 pptv 10 min 10 min
NO2 2 5 pptv 1 min 1 min
Spectrally resolved nadir & zenith flux for determination of: j(H2 O2 )
   j(CH2 OOH)
   j(CH2 O)
   j(HNO3 )
   j(CH3 ONO2 ) 		3 0.1 µw/nm/cm-2
280 nm - 420 nm
@ 1nm resloution 		30 sec 30 sec
CO2 3 0.5 ppmv
(precision) 		1 min 1 min
N2 O 3 0.5 ppbv
(precision) 		1 min 1 min
CH4 3 20 ppbv
(precision) 		1 min 1 min
SO2
3 5 pptv 5 min 5 min
DMS
3 1pptv 5 min 5 min
CH2 O
3 50 pptv 5 min 1 min
Aerosols number density (PMS probe or equivalent) 3 50/cm-3
(0.3 - 0.6 µm) 		10 sec 0 sec
Ultra fine aerosols
3 size range 3-10 nm 5 min 5 min
Black carbon
3 0.1 µg/m3 30 min 30 min
Aerosol composition
(ionic analysis) 		3 5 pptv 10 min 10 min
Organic nitrates
3 6 pptv 30 min 10 min
Storm Scope
3 range 400 km <3 min
hold time 		NA
Range-resolved remote water vapor 3 0.01g/kg Z < 500m
X < 70km 		Z < 500m
X < 70km
organic acids
4 10 pptv 10 min 10 min
Range-resolved remote temperature sounding 4 2 K 1 km  
NH 3

5 10 pptv 10 min 2 min
Range-resolved measurement of other chemical species (listed above) 5 species dependent (specify) 0 min 1 min

Table 1b Measurement Requirements for the P-3B Instrumentation
Species/Parameter Priority Detection Limit Time Resolution Time Resolution
5 X LOD
UV radiometer(+) (zenith & nadir) 1* 1 watt/m2 10 sec 10 sec
H2 O 1* 3 ppmv
1 min
[1 sec] 		10 sec
[1 sec]
NO 1 3 pptv
[1 pptv] 		1 min
[10 sec] 		10 sec
[10 sec]
CO 1* 5 ppbv 1 min
(1 sec) 		10 sec
(1 sec)
O3 (in situ) 1* 3 ppbv
[1 ppbv] 		30 sec
[1 sec] 		5 sec
[1 sec]
NMHC's(C2 -C6 ) 1 20pptC 5 min 5 min
Atmospheric State
Parameters(+) 		1 aircraft standard 1 sec 1 sec
SO2 1 5 pptv 5 mim 5 min
DMS 1 1pptv 5 min 5 min
Ultra Fine Aerosol 1 size range 3-12nm 5 min 5 min
Aerosol Size/ number resolved 2 size range
.03 to 3µm 		6 min 6 min
surface area 2 1 to 100 µm2 cm-3 10 min 10 min
NSS Sulfate & Particulate MSA 2 10 pptv 10 min in MBL
15 in FT 		5 min
10 min
HNO3 2 5 pptv 5 min 2 min
MSA(g) 2 5 x 105 molec/cm3 5 min 1 min
H2 SO4 (g) 2 2 x 105 molec/cm3 5 min 1 min
j(O1 D)
(nadir & zenith) 		2 2 x 10 -6 /s 30 sec 30 sec
j(NO2 )
(nadir & zenith) 		2 1 x 10 -4 /s 30 sec 30 sec
OH 2 0.03 pptv 5 min 1 min
NO2 2 5 pptv 1 min 1 min
H2 O2 2 10 pptv 5 min 5 min
CH2 O 2 50pptv 5 min 5 min
CH3 OOH 2 10 pptv 5 min 5 min
Alkyl Halides 2 0.1 pptv    
Alkyl Nitrates 2 0.1 pptv    
Remote Aerosol
(nadir and zenith) 		3 Scattering Ratio 1 @ 1um Z 100m
Z 100m
Halocarbons 3 2 pptv 5 min 5 min
Storm Scope (+) 3 range 400km <3 min holding
time 		NA
- u, v winds
- w winds
-Water vapor 		3 ±0.4 m/s
±5 cm/s
±0.1g/kg 		.1 s
.1 s
.1 s 		.1 s
.1 s
.1 s
CH4 3 20 ppbv
(precision) 		1 min 1 min
Nitrate aerosol 3   20 min 10 min
Spectrally resolved nadir & zenith flux for determination of: j(H2 O2 )
   j(CH2 OOH)
   j(CH2 O)
   j(HNO3 )
   j(CH3 ONO2 ) 		3 280 nm - 420 nm
@ 1nm resloution 		30 sec 30 sec
CO2 4 .5ppmv
(precision) 		1 min 1 min
Acetone 4 50 pptv 10 min 10 min
Organic Acids 4 20 pptv 20 min 10 min
PAN 4 5 pptv 5 min 5 min
NH3 5 5 pptv 1 min 1 min
DMSO(g) 5 5 x 106 molec/cm3 5 min 1 min
DMDS 5 0.2 pptv 5 min 1 min
DMSO2 5 5 x 106 molec/cm3 5 min 1 min

Description of priority ratings and footnotes for Tables 1a and 1b.
Rating Description Meaning
1* Mission Critical The measurement is essential to the interpretation of data related to the objectives of mission.
2 Very Important The measurement is important to several scientific issues being addressed by the mission.
3 Important The measurement is important to some scientific aspects of the mission. Rack/space requirements of instrument will be a prime consideration in selection
4 Less Important Measurements could be useful but information not considered critical to interpretation of mission results. A measurement at this level will be considered only if it utilizes an instrument used to make a measurement of a species at the priority 1 or 2 level.
5 Speculative Measurements are either speculative in nature or involve instruments that represent the application of new technologies to measuring species of high scientific interest. Major consideration will be given to having at least one measurement of this type on each mission.

* These for which redundancy will be provided where feasible.
+ Will be provided by the GTE Project Office
[ ] Desired characteristics

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