L2a User Guide

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About 19 results and 4 answers.

LP DAAC - Getting Started with GEDI L2A Version 2 Data

From the GEDI Level 2 User Guide: Use the sensitivity metric available in L2A and L2B to select "best" data. The L2A and L2B quality_flag datasets use a conservative sensitivity threshold of 0.9 over land (0.5 over ocean), but under some conditions (e.g. dense forest) the user may benefit from selecting a higher threshold.

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LP DAAC - Getting Started with GEDI L2A Data in Python

The purpose of the L2A dataset is to provide waveform interpretation and extracted products from each GEDI waveform. This includes ground elevation, canopy top height, relative return energy metrics (describing canopy vertical structure, for example), and many other interpreted products from the return waveforms. Science Dataset (SDS) layers: /rh

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User Guides - Sentinel-2 MSI - Level-2A Product - Sentinel

Level-2A. The Level-2A product provides Bottom Of Atmosphere (BOA) reflectance images derived from the associated Level-1C products. Each Level-2A product is composed of 100x100 km 2 tiles in cartographic geometry (UTM/WGS84 projection). Level-2A products are systematically generated at the ground segment over Europe since March 2018, and the …

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LP DAAC - GEDI02_A - USGS

The methodology for generating the GEDI02_A product datasets is adapted from the Land, Vegetation, and Ice Sensor (LVIS) algorithm. The GEDI01_B product is provided in HDF5 format and has a spatial resolution (average footprint) of 25 meters. The GEDI02_A data product contains 156 layers for each of the eight beams, including ground elevation ...

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Sentinel-2 L2A

Use sentinel-2-L2A (previously S2L2A) as the value of the input.data.type parameter in your API requests. This is mandatory and will ensure you get Sentinel-2 L2A data. Filtering Options This chapter will explain the input.data.dataFilter object of the S2L2A process API. mosaickingOrder

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Level-2A Unified Resolution Radiometric Product Algorithm

Jan 12, 2022 . Details of the L2A-URRP data product format can be found in the TROPICS Data User’s Guide. This ATBD will also contain the pre-launch testing completed to verify the algorithm. The TROPICS Data User’s Guide will contain the post-launch validation. Document ID 20220000328 Document Type Contractor or Grantee Report Authors

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Sentinel-2 MSI Document Library - User Guides - Sentinel

User Guides Sentinel-2 MSI S2-MSI Document Library Sentinel 2 Document Library Sentinel-2 L2A Data Quality Report Issue 46 (January 2022) This document provides the status of the Sentinel-2 Level-2A product quality as it stands in January 2022. It updates the information supplied in previously issued Reports. PDF Read more

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Frequently Asked Questions

  • What is level-2a ?

    Level-2A (L2A) products are re-sampled as L1C products with a constant GSD (Ground Sampling Distance) of 10m, 20m and 60 m according to the native resolution of the different spectral bands. If applicable, Level-2A products are provided for each MSI channel at coarser resolution (i.e. 20 m and 60 m) as well.

  • How do I select the best L2A and L2b data?

    Use the sensitivity metric available in L2A and L2B to select "best" data. The L2A and L2B quality_flag datasets use a conservative sensitivity threshold of 0.9 over land (0.5 over ocean), but under some conditions (e.g. dense forest) the user may benefit from selecting a higher threshold.

  • What are level-2a products made of?

    Each Level-2A product is composed of 100x100 km 2 tiles in cartographic geometry (UTM/WGS84 projection). Level-2A products are systematically generated at the ground segment over Europe since March 2018, and the production was extended to global in December 2018.

  • What is the L1b and L2 Gedi data format?

    The L1B and L2 GEDI products are archived and distributed in the HDF-EOS5 file format. This tutorial was developed using an example use case for a project being completed by the National Park Service. The goal of the project is to use GEDI L2A data to observe tree canopy height and profile over Redwood National Park in northern California.

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