C-131A
Convair C-131 Samaritan

If instrument model information is not available, can use this instrument entry for microphysics probes

The SR instrument is a 2 or 4 channel chemiluminescence-based NO-analyzer for all applications involving the measurement of extremely low concentrations. Optimized for airborne and ground use, typically in stratospheric research programs.

The Johnson-Williams Cloud Water Meter (CWM) utilizes a resistance wire that has been calibrated to infer liquid water content (LWC) within clouds. Evaporation of water droplets that impact the wire lead to temperature variations of the wire which can be linearly correlated with liquid water content. Additionally, a second wire allows compensation of altitude, temperature, and speed for more accurate measurements. The CWM can be operated over LWC ranges between 0 and 6 grams per cubic meter and at air speeds between 50 and 150 meters per second. Collection efficiency for the instrument has been shown to decrease when water droplets are larger than 30 micrometers; making the probe more beneficial for small droplet usage.

This data will be added in future versions.

The Particle Soot Absorption Photometer (PSAP) is an in situ airborne photometer manufactured by Radiance Research. It uses Beer's Law to measure the change in light transmission of aerosol particles. These measurements can be used to derive aerosol absorption and extinction. PSAP operates across three wavelengths (467, 530, and 660 nm) and has a temporal resolution of 1 second. It is typically deployed on aircraft, but it can be deployed on other platforms such as ships and vehicles.

The Passive-Cavity Aerosol Spectrometer Probe (PCASP) is an in situ airborne optical spectrometer manufactured by Droplet Measurement Technologies. It measures the light scattered by particles to determine the aerosol size distribution and concentration in the 0.1 to 3.0 μm size range. PCASP operates at the 632 nm wavelength and has a typical sampling rate of 10 Hz.

If instrument model information is not available, can use this instrument entry for temperature, pressues, wind speed, wind direction, humidity

The Airborne Tracking Sun Photometer (ATSP) is an airborne instrument that measures direct solar beam transmission. The ATSP measures solar beam transmission through multiple channels with wavelengths ranging between 354 and 2139 nm. These measurements can be used to derive aerosol optical depth and other aerosol properties. There are multiple versions of this instrument, including one developed by the NASA Ames Research Center.

The King Probe is an airborne cloud probe developed by Warren King (Commonwealth Scientific and Industrial Research Organisation) and manufactured by Particle Measuring Systems (PMS) and Droplet Measurement Technologies (DMT). The King Probe provides measurements of cloud liquid water content (LWC) by measuring the heat released when water droplets are vaporized. The King Probe operates at a constant temperature (~100 C) and has a data output rate of 1 to 10 Hz. It is typically used in cloud microphysics and aircraft icing studies.

Nephelometers are in situ airborne or ground-based optical sensors. They measure the total scattering and backscattering of aerosol particles in the atmosphere. Nephelometers operate across three wavelengths: 450 nm, 550 nm, and 700 nm, and have a typical time resolution of 1 Hz.

If instrument name or model is not available but documents show that specific chemical compounds or constituents or their properties were observed, can use instrument entry. Examples include: CO, CO2, NO, NO2, N2O, HNO3, HNO4, OH, H2SO4, CH3CN, O3, H2O, halocarbons, VOCs, nitrates, aerosols (including CCN), aerosol optical properties, etc...

The Forward Scattering Spectrometer Probe (FSSP) is an in situ airborne optical particle counter originally designed by Particle Measuring Systems, Inc. It provides particle size distribution by measuring the intensity of the light scattered by individual particles within the cloud. FSSP can detect particles within a diameter range of 0.5 to 47 μm. It operates at a wavelength of 633 nm and has a typical sampling frequency of 1 Hz.