The echo base product provides for each point on the surface, an estimate of the height of the lowest elevation of the first echo return that is above a reflectivity threshold.
Parameters
Product data quantity: altitude Image size: number of pixels per row (# of columns) and per column (# of rows) Pixel size: horizontal and vertical extension of the pixel in km Reflectivity threshold: value in 0.1 dBZ Level slicing method: list of values in 0.1 km a.s.l. or formula parameters (see section 7 in WD21_99)
Notes
• In areas where precipitation reaches ground or lowest measurement bin, this product shows undefined values. • The quality of this product depends crucially on number of elevations in the polar volume.