Author: CSDN @ _Yakult_
This paper records the method of downloading the GEDI Level 2B canopy cover and vertical profile index product (GEDI02_B) data set, in preparation for the subsequent extraction of GEDI waveform data, data preprocessing, waveform decomposition and feature extraction.
Article Directory
1. Download address
https://search.earthdata.nasa.gov/search
Open the earthdata website, log in to your account, search for GEDI, select a research area, and download the data.
The downloaded file looks like this, the format is h5
2. Dataset introduction
The GEDI Level 2B canopy cover and vertical profile indicator product (GEDI02_B) is an important product of the Global Ecosystem Dynamics Investigation (GEDI) mission. The product extracts biophysical metrics from each GEDI waveform used to characterize ecosystem structure and dynamics on Earth.
GEDI02_B products are based on GEDI Level 1B waveform data, and use the directional gap probability profile to derive various indicators. These indicators reflect the canopy coverage and vertical profile characteristics of vegetation, and provide important quantitative data for the study of the earth's carbon cycle and biodiversity.
In the GEDI02_B product, the vertical step size (also called dZ) between vegetation profile measurements is always kept at 5 meters. The organization of this dataset is rasterized, called LARSE/GEDI/GEDI02_B_002_MONTHLY. Each month's raster image is a composite image of the individual orbits corresponding to the month. Only root cover, pai and pavd values and their associated quality flags and metadata are preserved in raster bands. Each GEDI02_B_002 raster data contains 109 bands.
The GEDI mission aims to achieve a deep understanding of Earth's carbon cycle and biodiversity through the GEDI instrument, which is located on the International Space Station (ISS), to collect data at the highest resolution and densest sampling rate on a global scale between 51.6°N and 51.6°S latitudes. The GEDI instrument consists of three lasers that can sample eight surface transects about 25 meters apart at about 60-meter intervals per orbit, providing comprehensive observations of the Earth's three-dimensional structure.
The GEDI Level 2B Canopy Cover and Vertical Profile Indicator Product (GEDI02_B) provides scientists and researchers with a valuable data resource that can help improve the quantitative description and understanding of Earth's ecosystems.
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