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Instrument

TDDR
Total Direct Diffuse Radiometer

The Total Direct Diffuse Radiometer (TDDR) is a passive radiometer that measures solar irradiance. It can be used for airborne and ground-based operations. TDDR measures total and diffuse irradiance by rotating a shadow arm before the radiometer. These measurements can be used to calculate the direct solar irradiance. TDDR operates across the 0.38-1.6 μm spectral range with a 0.01 μm bandwidth.

NASA's DC-8 flying laboratory passes Antarctica's tallest peak, Mount Vinson, on Oct. 22, 2012, during a flight over the continent to measure changes in the massive ice sheet and sea ice. Credit: NASA/Michael Studinger (Photography courtesy NASA Images)

Overview

Instrument Details

Measurement Type

Spectrometer/Radiometer

Measurement/Variables

Earth Science > Atmosphere > Atmospheric Radiation > Solar Irradiance

Earth Science > Atmosphere > Atmospheric Radiation

Vertical Measurement Regions

Land Surface, Troposphere

Temporal Resolution

N/A

Spatial Resolution

N/A

Measurement Frequency

187.4-788.9 THz

Calibration Details

Currently unavailble

Online Information

Lead Investigator
Currently unavailable
Technical Contact
Currently unavailable
Instrument Maker
Currently unavailable
Funding Source
Currently unavailable
Overview Publications
Currently unavailable
Repository
- Unpublished

Instrument Operation

Platform

Campaigns, where the platform was used with this instrument

Image of ER-2 taking off

Image of ER-2 taking off

NASA Earth Resources-2 Aircraft

62 Campaigns · 107 Instruments

Atmospheric Radiation Measurement Enhanced Shortwave Experiment

Southern Great Plains, Southwestern United States

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· 1 Data Product

Central Equatorial Pacific Experiment

Central Pacific Ocean

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· 1 Data Product

NASA owned image of the DeHavilland DHC-6-300 Twin Otter

NASA owned image of the DeHavilland DHC-6-300 Twin Otter

DeHavilland DHC-6-300 Twin Otter

19 Campaigns · 71 Instruments

Atmospheric Radiation Measurement Enhanced Shortwave Experiment

Southern Great Plains, Southwestern United States

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· 1 Data Product

Grob G-520 Egrett

1 Campaign · 5 Instruments

Atmospheric Radiation Measurement Enhanced Shortwave Experiment

Southern Great Plains, Southwestern United States

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· 1 Data Product

Field site of rain gauges and soil moistures sensors from the IFloodS campaign

Field site of rain gauges and soil moistures sensors from the IFloodS campaign

Campaign Field Sites

66 Campaigns · 159 Instruments

Atmospheric Radiation Measurement Enhanced Shortwave Experiment

Southern Great Plains, Southwestern United States

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· 1 Data Product

First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment

Central and Midwest United States, California Coast, Northwest Africa, Alaska

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· 131 Data Products

NCAR Sabreliner

2 Campaigns · 21 Instruments

First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment

Central and Midwest United States, California Coast, Northwest Africa, Alaska

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· 131 Data Products

SPEC Learjet during the SEAC4RS campaign

SPEC Learjet during the SEAC4RS campaign

SPEC Inc. Learjet 25

7 Campaigns · 28 Instruments

Central Equatorial Pacific Experiment

Central Pacific Ocean

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· 1 Data Product

Data Products

There are no data products linked to this campaign in CASEI - yet.