CALIPSO-NVF Level 2
Entry Title: CALIPSO Night Validation Flights High Spectral Resolution Lidar (HSRL-2) Data

Entry ID: CALIPSO-NVF_HSRL2_KingAir_Data_1
Aerosols
Description

The CALIPSO Night Validation Flights (CALIPSO-NVF) airborne deployment was conducted in August 2022 out of Bermuda. The goal was to conduct a series of nighttime underflights of the CALIPSO satellite with the NASA Langley High Spectral Resolution Lidar (HSRL-2). Airborne measurements from the NASA Langley HSRL-2 instrument are essential for verifying the calibration accuracy of the CALIPSO lidar and for acquiring information on aerosol optical properties used for its aerosol profile retrievals. By flying under the CALIPSO ground track, HSRL-2 provides an independent measurement of lidar attenuated backscatter with a higher signal-to-noise ratio. To obtain this important validation dataset, the HSRL-2 was flown on board the LaRC B-200 King Air as CALIPSO passed within range of the aircraft. The western Atlantic Ocean was selected for CALIPSO-NVF to allow unobstructed, 45-minute flights along the satellite ground track. Five nighttime underflights were executed in total – four in cloud-free skies on August 7, 10, 12, and 17th, yielding ideal data from both instruments for calibration validation. The fifth flight on August 18th targeted measurements beneath cirrus to assess the accuracy of CALIPSO aerosol retrievals through high clouds at night, an important but previously unexplored validation target. Total research flight time was 17.7 hours, sampling 2,200 km along the CALIPSO ground track.

DOI

10.5067/SUBORBITAL/CALIPSO-NVF/DATA001

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Keywords

From GCMD Science Keywords:
  • AEROSOL BACKSCATTER
  • AEROSOL OPTICAL DEPTH/THICKNESS
  • LIDAR BACKSCATTER
  • ANGSTROM EXPONENT > AEROSOL OPTICAL DEPTH/THICKNESS
  • LIDAR DEPOLARIZATION RATIO
  • AEROSOL EXTINCTION
Data Distribution

File Format(s):

HDF5, zip

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Spatial Information

spatial-coverage-map
Spatial Coverage: (S: 25, N: 38), (W: -69.3, E: -58.9)
Spatial Coverage Type: Horizontal Vertical
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian
Locations

BERMUDA NORTH ATLANTIC OCEAN NORTHERN HEMISPHERE WESTERN HEMISPHERE
Temporal Information

Temporal Coverage: 2022-08-06 - 2022-08-19
Platforms

Propeller
King Air
Beechcraft King Air
HSRL-2
Metadata Dates

Created on 2023-02-07
Last updated on 2023-04-17