The UMIST Cessna

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The UMIST Cessna
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Aircraft Performance

• The UMIST Cessna offers great flexibility in
  flight planning
• equipment fit
• route
• altitude

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Standard Equipment

• Position
• Heading
• Pitch angle
• Bank angle
• Pressure altitude
• Radar altitude (height above terrain up to 750m)
• Indicated air speed
• True air speed
• Vertical accelerometer

• Measurements
• Rosemount temperature - 1 Hz
• Reverse flow temp - 1 Hz
• Michell Hygrometer dewpoint temperature - 5s

• New Development
• Javad Differential GPS
• 20 Hz
• ground heading and track
• altitude
• aircraft attitude - pitch, roll, heading
• ideal for future use with UMIST turbulence probe

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Additional Equipment

• Trace Gases
• Scintrex LMA-4 NO2/NOx
• 4 Hz response
• Scintrex LOz O3
• 5 Hz response
• LiCor 6210 H2O/CO2
• 5 Hz response

LiCor
LMA-4
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Additional Equipment

• TDL - H2O
• University of Aberystwyth
• compact (for a TDL!)
• better than 1 Hz response
• relative error 1-5 ppm
• can be tuned boundary layer work

The plot to the left shows a LIDAR trace of
cirrus cloud (top plot), and the TDL data for
relative humidity and mixing ratio variation
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Available Equipment

• Particle Counters
• PMS ASASP-X
• 0.1-3 µm diameter
• 32 size bins sampled at 20 Hz
• TSI 3010
• total condensation particle count
• adjustable cut off from 10-120 nm
• TSI 3025
• total condensation particle count
• lower cut-off 3 nm

ASASP-X
Cut-off diffusion filter
pump
TSI 3010
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Available Equipment

• Miscellaneous
• FSSP
• large particle/cloud droplet size 1-47 µm
  diameter
• 20 Hz
• KT-19 surface IR thermometer
• Eppley Radiometers
• up and down facing

KT-19
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Previous Campaigns
SASUA, Edinburgh
NOx and O3 are anti-correlated in the plume
NE wind carries pollutants downwind of Edinburgh,
clearly showing dispersing plume
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Previous Campaigns
SASUA, Edinburgh
Comparison of particle concentration as a
function of location shows the blocking effect of
terrain
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Previous Campaigns
PUMA, Birmingham
Even small-scale features, such as the heat
island effect immediately downwind of
Kiddermister, can be seen
Evolution of the urban plume across the
Birmingham conurbation is clearly observed
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Previous Campaigns
PUMA, Birmingham
Where CAA restrictions and atmospheric conditions
allow, soundings can be made, up to 3000 m (10
000 ft)
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CSIP - Cessna Range