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Imaging · collection · 2024

CYGNSS Level 1 Calibrated Raw IF Version 1.0

Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/cygns-l1r10

The CYGNSS Level 1 Calibrated Raw IF Version 1.0 dataset is produced by the CYGNSS Science Team of the University of Michigan, and it contains the first release, Version 1.0, of the CYGNSS Calibrated Raw Intermediate Frequency (IF) based L1 Product.

Description

CYGNSS was launched on 15 December 2016, it is a NASA Earth System Science Pathfinder Mission that was launched with the purpose of collecting the first frequent space‐based measurements of surface wind speeds in the inner core of tropical cyclones.

Originally made up of a constellation of eight micro-satellites, the observatories provide nearly gap-free Earth coverage using an orbital inclination of approximately 35° from the equator, with a mean (i.e., average) revisit time of seven hours and a median revisit time of three hours. This product includes several established signal coherence detectors, including the power-ratio P<sub>ratio</sub>, complex zero-Doppler delay waveform and full entropy E<sub>full</sub>, and a novel fast entropy detector E<sub>fast</sub>.

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Both entropy detectors are provided with two temporal resolutions: 2 ms and 50 ms. Several scattered signal strength products are included: Signal-to-Noise Ratio SNR, reflected power P<sub>g</sub>, reflectivity Γ, and Normalized Bistatic Radar Cross-Section NBRCS. Each of these products is derived using a coherent integration time of T<sub>c </sub>= 1 ms and incoherent integration times of N<sub>inc</sub> = 1000, 500, 250, 100, 50, and 2 ms.

Signal strength time series at the shorter (2 and 50 ms) times provides excellent detection of land-water transitions in heterogeneous scenes. Delay Doppler Maps (DDMs) are also generated with high delay (∆τ = 1/16 chip) and Doppler (∆f= 50 Hz) resolution. This suite of coherence detection methods can be used to detect the presence of small inland water bodies.

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Catalogue records · 3

Topics

Stated by source
Cyclone Global Navigation Satellite System · Delay Doppler Mapping Instrument · Sensor Counts
From keywords
Astronomy & Astrophysics · Earth & Environmental Science · Engineering · Ocean & Atmospheric Science · Physics
Provenance · 2 source records, 18 field assertions
SourceKeyLast seenRaw
NASA Earthdata CMRC2927929087-POCLOUD10 d agoJSON v1
NASA Data Portal178f86c1-489b-4584-b6bf-4098482b81cf7 d agoJSON v1
FieldAssertionExtractorEvidence
access_levelsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[field].local:field:astronomymapping · data nasa govconnector:data_nasa_gov@1.0.0
concepts[field].local:field:earth-environmentalmapping · data nasa govconnector:data_nasa_gov@1.0.0
concepts[field].local:field:engineeringmapping · data nasa govconnector:data_nasa_gov@1.0.0
concepts[field].local:field:ocean-atmosphericmapping · data nasa govconnector:data_nasa_gov@1.0.0
concepts[field].local:field:physicsmapping · data nasa govconnector:data_nasa_gov@1.0.0
concepts[instrument].gcmd_instrument:ddmisource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/spectral-engineering/radar/sensor-countssource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[platform].gcmd_platform:cygnsssource · NASA CMRconnector:nasa_cmr@1.0.0
created_datesource · NASA CMRconnector:nasa_cmr@1.0.0
descriptionsource · NASA CMRconnector:nasa_cmr@1.0.0/umm/Abstract
license_textsource · data nasa govconnector:data_nasa_gov@1.0.0
publication_datesource · NASA CMRconnector:nasa_cmr@1.0.0
spatialsource · NASA CMRconnector:nasa_cmr@1.0.0/umm/SpatialExtent
temporalsource · NASA CMRconnector:nasa_cmr@1.0.0/umm/TemporalExtents
titlesource · NASA CMRconnector:nasa_cmr@1.0.0/umm/EntryTitle
updated_datesource · NASA CMRconnector:nasa_cmr@1.0.0
version_labelsource · NASA CMRconnector:nasa_cmr@1.0.0