What is AVHRR used for?
What is AVHRR used for?
The Advanced Very High Resolution Radiometer (AVHRR) multi-purpose imaging instrument is used for global monitoring of cloud cover, sea surface temperature, ice, snow and vegetation cover characteristics.
What is AVHRR?
Overview. Background. The Advanced Very High Resolution Radiometer (AVHRR) is a broad-band, four or five channel (depending on the model) scanner, sensing in the visible, near-infrared, and thermal infrared portions of the electromagnetic spectrum.
How many bands does AVHRR have?
AVHRR spectral bands and specifications The Advanced Very High Resolution Radiometer is a multispectral sensor with six spectral bands. This includes red, thermal, mid, and near-infrared bands.
What is the temporal resolution of AVHRR?
The Advanced Very High Resolution Radiometer (AVHRR) is a cross-track scanning system with five spectral bands having a resolution of 1.1 km and a frequency of earth scans twice per day (0230 and 1430 local solar time).
What is one problem for the Avhrr?
Uncertainty in extrapolating navigation corrections over remote regions is examined and quantified.
Is Avhrr optical?
The Advanced Very High Resolution Radiometer (AVHRR) Aerosol Optical Thickness (AOT) Climate Data Record (CDR) provides daily and monthly versions of an optical measure of aerosol column loading derived from the global ocean pixel-level Pathfinder Atmosphere Extend (PATMOS-x) AVHRR clear-sky reflectance CDR at 0.63μm …
What is the radiometric resolution of Avhrr?
The Advanced Very High Resolution Radiometer (AVHRR) provides four- to six-band multispectral data from the NOAA polar-orbiting satellite series. There is fairly continuous global coverage since June 1979, with morning and afternoon acquisitions available. The resolution is 1.1 kilometer at nadir.
What are the limitations of satellite oceanography?
There are five categories of limitations on the utility of the AVHRR data for Earth surface applications: (1) spatial resolution and its space-time variability; (2) atmospheric effects on measurements; (3) no in-flight calibration of visible and near-infrared sensors; (4) special problems with the mid-infrared sensor; …
Is Avhrr active or passive?
All of these climatologies make use of measurements of the Advanced Very High Resolution Radiometer (AVHRR), which is a passive imaging sensor with five to six spectral bands in the visible, near-infrared and thermal infrared parts of the electromagnetic spectrum.
What data do satellites collect?
Polar-orbiting satellites collect data for weather, climate, and environmental monitoring applications including precipitation, sea surface temperatures, atmospheric temperature and humidity, sea ice extent, forest fires, volcanic eruptions, global vegetation analysis, as well as search and rescue.
What can satellites detect?
Satellite sensors can detect light that we can’t see. The electromagnetic energy reflects off the Earth’s surface and up to the satellite sensor, which collects and records information about that energy. That information is transmitted to a receiving station in the form of data that are processed into an image.