VARIABLE |
INSTRUMENT |
RANGE |
ACCURACY |
RESOLUTION |
NOTES |
Static Pressure |
Rosemount 1301-A-4B |
0-15 psi(0-103 kPa) |
0.015 psi |
0.0002
psi |
|
Rosemount 1301-A-4B |
5-15 psi (35-103 kPa) |
0.015 psi |
0.0002
psi |
||
Total Temperature |
Rosemount 102AU2AP |
-30 to +30C |
0.5C |
0.001C |
Platinum wire 2 s time constant |
NCAR Reverse Flow |
-30 to +30C |
0.5C |
0.001C |
Platinum RTD element Several seconds time constant |
|
Cloud
Water and |
DMT
Liquid Water |
0 - 4 g/m3 |
20% |
0.0001 g/m3 |
Sampling rate 4 l/km |
Particle Measuring Systems, Inc. Forward Scattering Spectrometer Probe |
Size
1 < 67 mm 0 - 2000 droplets/cm3 |
1 size channel in size and 1% in concentration at ~50/cm3 |
1 size channel |
15 discrete size channels spread over an adjustable range Sampling rate 300 cm3/km Accuracy of computed liquid water concentration ~50%. Depends on processing. |
|
Precipitation Particle Sizes And Concentrations |
Particle
Measuring |
Size 25 - 800 mm |
25 mm |
25 mm |
Computed ice and water mass concentration can vary 50% with processing technique Sampling rate: 0.05 m3/km; DAS can accept ~250 particles/s (2500/km) |
High-Volume Particle Sampler |
SPEC HVPS |
Size 0.2 50 mm |
0.2 mm |
0.2 mm |
Sampling rate: 10 m3/km Also senses particle electric charge |
Hail Spectrometer |
Size 4.5 mm - 4.5 cm Concentration 0 - 100/m3 |
1 size class |
1 size class |
14 size classes, and images Sampling rate 100 m3/km |
|
Aircraft Motion |
Humphrey
|
2 g's |
0.004
g's |
0.00006
g |
|
Rosemount
1301-D-1b |
|
0.1% |
0.0001
psi |
||
Rosemount
1221-F-2A |
2.5
to +2.5 psi |
0.1% |
0.0001
psi |
||
Giannini
45218YE |
0 to 50 in Hg |
2% |
0.008
Hg |
Used in backup vertical velocity calculation |
|
Crossbow Non-Stabilized 3-Axis Accelerometer |
4 g in all 3 directions |
0.2% |
3.05 x 10-4 g's |
||
Aircraft Location |
Trimble TNL2000 GPS |
(global) |
30 m |
18 m |
|
Electric Field |
NMIMT
Model E-100 |
top/bot
650 |
(coarse
resolution) |
||
NOTE: Many of these instruments do not behave as ideal instruments. The use of one measure of accuracy over the entire range of measurement is, in many cases, questionable. An accuracy representative of the most useful part of the range is given here.Revised 01/2001 |