Aspen Avionics Evolution EFD 1000 MFD - Page 109

CHAPTER 5 REFERENCE GUIDE
EFD1000/500 MFD Pilot’s Guide
Page 5-30 091-00006-001 REV B
EFD1000/500 MFD Pilot’s Guide
Page 5-31091-00006-001 REV B
NEXRAD weather surveillance can detect most precipitation within 80 nm, and intense
rain or snow within 140 nm, of the radar. NEXRAD measures moisture in DBz or decibels
of Z, with Z representing the reection back to the radar. NEXRAD does not report
precipitation below 10 DBz. The EFD1000/500 MFD displays NEXRAD precipitation data
using the colors and DBz ranges outlined in Figure 5-34.
NEXRAD coverage displays using the following methodology:
• If US Precipitation Type is not available and US NEXRAD Radar is available, the US
weather depiction is displayed as rain.
• If US Precipitation Type is available and US NEXRAD Radar is not available, the US
weather depiction is not displayed.
• If US coverage is not available or expired and US NEXRAD is available, the US
weather depiction is displayed as if all US radar sites are valid.
• If Canada coverage is not available and Canada Radar is available, the Canada
weather depiction is displayed as if all US radar sites are valid.
• If US NEXRAD Radar or Canada Radar exceed the specied expiration time, the
depiction for the respective radar is displayed as no Radar Coverage.
• If Puerto Rico NEXRAD Radar exceeds the specied expiration time, the Puerto Rico
NEXRAD Radar depiction for the respective radar displays as no Radar Coverage.
Figure 5-34 NEXRAD
Precipitation Colors