A recently launched NASA EV satellite remote sensing mission known as Cyclone Global Navigation Satellite System (CYGNSS) is dependent upon fundamental GPS measurements from a remote sensing technique known as Global Navigation Satellite System Reflectometry (GNSS-R). It's similar to other radar-based spaceborne remote sensing techniques, however it depends on GPS-based specular reflection on the Earth's surface. There is likewise a receiver antenna on each of the CYGNSS platforms that requires the gain signal a prerequisite to perform science measurements. More can be read about CYGNSS here: https://podaac.jpl.nasa.gov/CYGNSS
As a result of reviewing the Level 1 metadata, it has come to our attention that the fundamental antenna gain unit, dBi, is not available in UDUNITS-2. As a representative of the CYGNSS Project, I would like to propose the following definition for dBi:
The gain of an antenna in dBi is the gain in the direction of maximum radiated intensity with respect to an antenna that emits the same total power uniformly in all directions (an isotropic antenna). If a given antenna at a given distance radiates at an intensity of I_a (power per unit area) in the direction of peak radiated intensity, then with respect to a theoretical lossless isotropic antenna radiating the same total power and an intensity I_i at the given distance, the gain of the antenna G in dBi is given by: G = 10*log 10 (I_a/I_i).
Please let me know if you need any additional information to process this request.
A recently launched NASA EV satellite remote sensing mission known as Cyclone Global Navigation Satellite System (CYGNSS) is dependent upon fundamental GPS measurements from a remote sensing technique known as Global Navigation Satellite System Reflectometry (GNSS-R). It's similar to other radar-based spaceborne remote sensing techniques, however it depends on GPS-based specular reflection on the Earth's surface. There is likewise a receiver antenna on each of the CYGNSS platforms that requires the gain signal a prerequisite to perform science measurements. More can be read about CYGNSS here: https://podaac.jpl.nasa.gov/CYGNSS
As a result of reviewing the Level 1 metadata, it has come to our attention that the fundamental antenna gain unit, dBi, is not available in UDUNITS-2. As a representative of the CYGNSS Project, I would like to propose the following definition for dBi:
The gain of an antenna in dBi is the gain in the direction of maximum radiated intensity with respect to an antenna that emits the same total power uniformly in all directions (an isotropic antenna). If a given antenna at a given distance radiates at an intensity of I_a (power per unit area) in the direction of peak radiated intensity, then with respect to a theoretical lossless isotropic antenna radiating the same total power and an intensity I_i at the given distance, the gain of the antenna G in dBi is given by: G = 10*log 10 (I_a/I_i).
Please let me know if you need any additional information to process this request.