Instrumentation Table |
VARIABLE |
INSTRUMENT |
RANGE |
ACCURACY |
RESOLUTION
(as recorded) |
NOTES |
Static Pressure |
Rosemount 1301-A-4B |
0-15 psi (0-103 kPa) |
±
0.015 psi
(±
0.1kPa) |
0.0002 psi
(0.002 kPa) |
|
|
Rosemount 1301-A-4B |
5-15 psi (35-103 kPa) |
±
0.015 psi
(±
0.1kPa) |
0.0002 psi
(0.002 kPa) |
|
Total Temperature |
Rosemount 102AU2AP |
-30 to +30°
C |
±
0.5°
C |
0.001°
C |
- Platinum wire
- 2 s time constant
|
|
NCAR Reverse Flow |
-30 to +30°
C |
±
0.5°
C |
0.001°
C |
- Platinum RTD element
- Several seconds time constant
|
Cloud Water and
Cloud Droplets |
DMT Liquid Water
Concentration |
0 - 4 g/m3 |
±
20% |
0.0001 g/m3 |
|
|
Particle Measuring Systems, Inc.
Forward Scattering Spectrometer Probe |
Size 1 < 67 m
m
Concentration
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
Systems, Inc.
2D Cloud Probe |
Size 25 - 800 m
m |
±
25 m
m |
25 m
m |
- 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
SA09-D0101-1 Vertically Stabilized Accelerometer |
±
2 g's
pitch –50°
to 50°
roll –50°
to +50°
|
0.004 g's
0.2°
0.2°
|
0.00006 g
0.002°
0.002°
|
|
|
Rosemount 1301-D-1b
Dynamic Pressure |
–3 to +3 psi
(–20 to +20 kPa) |
±
0.1% |
0.0001 psi
(0.0006 kPa) |
|
|
Rosemount 1221-F-2A
Dynamic Pressure |
–2.5 to +2.5 psi
(–18 to +18 kPa) |
±
0.1% |
0.0001 psi
(0.0006 kPa) |
|
|
Giannini 45218YE
Manifold Pressure |
0 to 50 in Hg |
±
2% |
0.008 Hg
(0.03 kPa) |
- 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
DC Electric Field Meter |
top/bot ±
650
wingtips ±
3200 kV/m
5th and 6th ±
340 |
|
(coarse resolution)
0.01 kV/m |
|
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 |