The Active Sensing of CO2 Emission over Nights, Days, and Seasons (ASCENDS) was a NASA campaign that measured carbon dioxide (CO2) across North America to help with the development of a new satellite instrument. ASCENDS had 6 deployments from 2010 to 2017 across the western United States, the Midwest, Alaska, and Canada. NASA’s DC-8 aircraft was equipped with multiple sensors including the CO2 Sounder Lidar, CO2 Laser Absorption Spectrometer (CO2LAS), and Atmospheric Vertical Observations of CO2 in the Earth's Troposphere (AVOCET) to collect measurements of CO2. ASCENDS was funded through NASA’s Upper Atmosphere Research Program.
The MFLL is an airborne lidar system, a single-beam multi-pixel laser altimeter using PRN (Pseudo Random Noise) modulated fiber lasers. The major goal of MFLL is to demonstrate the required lidar technology concept for the LAS (Laser Absorption Spectrometer) to be flown on the future spaceborne ASCENDS (Active Sensing of CO2 Emissions over Nights, Days, and Seasons) mission of NASA.
The Atmospheric Vertical Observations of CO2 in the Earth’s Troposphere (AVOCET) is an airborne in situ spectrometer developed by NASA’s Langley Research Center (LaRC). AVOCET uses a differential, non-dispersive infrared spectrometer to provide high-resolution measurements of carbon dioxide (CO2). It operates at the 4.26 μm CO2 absorption band and has a measurement frequency of 5 Hz. AVOCET has been deployed in several field investigations since the early 1990s and has participated in over 450 science flights.
The Picarro gas concentration analyzer is an in situ airborne or ground-based sensor manufactured by Picarro, Inc. It uses Wavelength-Scanned-Cavity Ring Spectroscopy (WS-CRDS) to measure trace gases such as carbon dioxide, carbon monoxide, methane, and water vapor. For carbon dioxide measurements, the laser within Picarro operates at 1603 nm wavelength and 1651 nm wavelength for methane and water vapor measurements. Picarro has a typical sampling time of 2.5 seconds. Depending on the model, Picarro can also provide measurements of carbon isotopes for gas concentrations.
The Picarro gas concentration analyzer is an in situ airborne or ground-based sensor manufactured by Picarro, Inc. It uses Wavelength-Scanned-Cavity Ring Spectroscopy (WS-CRDS) to measure trace gases such as carbon dioxide, carbon monoxide, methane, and water vapor. For carbon dioxide measurements, the laser within Picarro operates at 1603 nm wavelength and 1651 nm wavelength for methane and water vapor measurements. Picarro has a typical sampling time of 2.5 seconds. Depending on the model, Picarro can also provide measurements of carbon isotopes for gas concentrations.
The Atmospheric Vertical Observations of CO2 in the Earth’s Troposphere (AVOCET) is an airborne in situ spectrometer developed by NASA’s Langley Research Center (LaRC). AVOCET uses a differential, non-dispersive infrared spectrometer to provide high-resolution measurements of carbon dioxide (CO2). It operates at the 4.26 μm CO2 absorption band and has a measurement frequency of 5 Hz. AVOCET has been deployed in several field investigations since the early 1990s and has participated in over 450 science flights.
The MFLL is an airborne lidar system, a single-beam multi-pixel laser altimeter using PRN (Pseudo Random Noise) modulated fiber lasers. The major goal of MFLL is to demonstrate the required lidar technology concept for the LAS (Laser Absorption Spectrometer) to be flown on the future spaceborne ASCENDS (Active Sensing of CO2 Emissions over Nights, Days, and Seasons) mission of NASA.
The Atmospheric Vertical Observations of CO2 in the Earth’s Troposphere (AVOCET) is an airborne in situ spectrometer developed by NASA’s Langley Research Center (LaRC). AVOCET uses a differential, non-dispersive infrared spectrometer to provide high-resolution measurements of carbon dioxide (CO2). It operates at the 4.26 μm CO2 absorption band and has a measurement frequency of 5 Hz. AVOCET has been deployed in several field investigations since the early 1990s and has participated in over 450 science flights.
The Diode Laser Hygrometer (DLH) is an in situ airborne hygrometer developed by NASA’s Langley Research Center (LaRC). It uses tunable diode laser absorption to measure water vapor in the atmosphere. DLH operates in the near-infrared region at around 1.4 μm and has a measurement frequency of 100 Hz. It can provide accurate measurements of water vapor even while flying through clouds.
Earth Science > Atmosphere > Atmospheric Water Vapor
Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Water Vapor
Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Humidity > Relative Humidity
Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Humidity
The Atmospheric Vertical Observations of CO2 in the Earth’s Troposphere (AVOCET) is an airborne in situ spectrometer developed by NASA’s Langley Research Center (LaRC). AVOCET uses a differential, non-dispersive infrared spectrometer to provide high-resolution measurements of carbon dioxide (CO2). It operates at the 4.26 μm CO2 absorption band and has a measurement frequency of 5 Hz. AVOCET has been deployed in several field investigations since the early 1990s and has participated in over 450 science flights.
The Diode Laser Hygrometer (DLH) is an in situ airborne hygrometer developed by NASA’s Langley Research Center (LaRC). It uses tunable diode laser absorption to measure water vapor in the atmosphere. DLH operates in the near-infrared region at around 1.4 μm and has a measurement frequency of 100 Hz. It can provide accurate measurements of water vapor even while flying through clouds.
Earth Science > Atmosphere > Atmospheric Water Vapor
Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Water Vapor
Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Humidity > Relative Humidity
Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Humidity
The Picarro gas concentration analyzer is an in situ airborne or ground-based sensor manufactured by Picarro, Inc. It uses Wavelength-Scanned-Cavity Ring Spectroscopy (WS-CRDS) to measure trace gases such as carbon dioxide, carbon monoxide, methane, and water vapor. For carbon dioxide measurements, the laser within Picarro operates at 1603 nm wavelength and 1651 nm wavelength for methane and water vapor measurements. Picarro has a typical sampling time of 2.5 seconds. Depending on the model, Picarro can also provide measurements of carbon isotopes for gas concentrations.
The Airborne Cavity Enhanced Spectrometer (ACES) is a two-channel spectrometer designed for aircraft measurements of glyoxal (CHOCHO), methylglyoxal (CH3COCHO), nitrous acid (HONO), nitrogen dioxide (NO2), and water vapor (H2O). ACES makes high-sensitivity measurements of trace gases and aerosols as light passes through the optical cavity equipped with a grating spectrometer and a charge-coupled device. ACES operates across two wavelength ranges (361-389 nm and 438-468 nm) and has high precision and temporal frequency.
