The receiver work leverages the development of the GLAS optical receiver for Since it leverages our concept definition work supported by Goddard Director s Discretionary funding, its transmitter technologyįrom the 1570 nm diode and fiber lasers being developed in telecommunications industry, and 760 nm diode lasers beingĭeveloped under a NASA-Goddard Phase-2 SBIR. Our technology is presently at TRL level 2.5, and through this work we will exit at TRL level 5. We will also develop and demonstrate the photon counting detectors and narrow band filters and etalons needed for the receiver atīoth wavelengths in a laboratory breadboard. Similar approach for O2 measurements in the O2 A-band near 761 nm, but follow the seed laser by semiconductor laser amplifiers. However, they require further development for spectroscopic measurements of CO2 and for power scaling. These components are widely used in the fiber telecommunications It will be locked to a CO2 line in an absorption cell andįollowed by an array of erbium-doped fiber optical-amplifiers. Semiconductor laser operating in the CO2 overtone band near 1572 nm. For the CO2 measurements, we will use a tunable single frequency Measurement capability and at the breadboard level. We will demonstrate bench top versions of our transmitters and receivers and our CO2 and O2 Used at the dawn-dusk periods, which show maximum response from the diurnal CO2 cycle.įor this NRA, we will develop and demonstrate laboratory versions of the critical laser and receiver technology and conduct Linewidth lasers and has much higher spectral resolution, and precision than is possible with passive spectrometers. Our laser technique uses very narrow (MHz) It permits the tropospheric columnĬO2 to be normalized to O2 measurements with the needed 0.5 ppm accuracy. Needed to address the primary science questions on surface-atmosphere carbon exchange. Our approach measures the relative abundance of CO2 at the dawn and dusk times Laser echoes reflected from the Earth s land and water surfaces as the two lasers are rapidly tuned on and off the selectedĪtmospheric CO2 and O2 absorption lines. Relative tropospheric column abundance of this important greenhouse gas every two weeks. Such measurements from an orbital sounder can be used to generate, for the first time, global maps of the These will be used in a new orbital laser sounding approach for measuring the spatially resolved column abundance of CO2 in theĮarth’s atmosphere. Title: Laser Sounder Technology for Atmospheric CO2 Measurements from SpaceĪbstract: We propose to develop and demonstrate the critical laser technology which will enable atmospheric CO2 measurements from orbit. Ultrahigh Dynamic Range, High-Speed A/D Converter for Laser RangingĪ 256 Baseline, 2-Bit Cross-Correlator Chip for a Spaceborne Synthetically Thinned Aperture Radiometer Ultra Low-Power Digital Correlator Detector for Microwave Polarimetry and RadiometryĪ Ka-Band Active Array for Remote Sensing of PrecipitationĮfficient, Conductively-Cooled 2-Micron Laser Transmitter for Multiple Lidar Applications Multi-Spectral Staring CMOS Focal-Plane Array for Oceanographic Imaging Applications Wide Field of View Adaptive Optical System for Lightweight Deployable Telescope Technologies Quantum Interface Gravity Gradiometer for 3-D Sub-Surface MappingĪdvanced Optical Heterodyne Receiver Development for Coherent Doppler Wind Lidar Small and Smart Sensor for Atmospheric Terahertz Limb SoundingĬontrolled-Correlation Subsystem for On-Board receiver Calibration of Synthetic Thinned Array Radiometers (STAR) and Fully-Polarimetric (FP) Microwave Radiometersĭiode Laser Stabilization for Optical Metrology: an Optical Atomic Clock in Support of Time-Varying Gravity-Mapping Missions High Efficiency, Double-Pulsed, High Beam Quality, Nd Laser for Global Ozoneĭevelopment of a Monolithic GaAs Hyperspectral Infrared QWIP Imaging SystemĪ Compact, Highly-Efficient, and Rugged All Solid-State UV Source Based on Fiber Lasers for UV-DIAL Synthetic Aperture (SAR) Radar On-Board Azimuth Pre-Filter Processor High Efficiency Remote Sensing Laser Technology Water Vapor DIAL Transmitter at 0.94 MicrometersĮfficient, Compact, Conduction Cooled Laser Diode-Pumped Yb:YAG Laser for Atmospheric Composition and Ozone Measurementsĭevelopment of a Low Power, Miniaturized Module for the Next Generation Microwave Radiometers Laser Sounder Technology for Atmospheric CO2 Measurements from Space
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