Requirement #702 


For variable: Downward long-wave irradiance at Earth surface

In application: Nowcasting / VSRF

Goal Breakthrough Threshold
Uncertainty 1 W.m-2 10 W.m-2 20 W.m-2
Stability/decade (if applicable)
Horizontal Resolution 5 km 15 km 50 km
Vertical Resolution
Observing Cycle 60 min 3 h 12 h
Timeliness 60 min 3 h 12 h


Validated: 4/15/13 Source: P. Ambrosetti
Comment: necessary to compute radiance balance at the surface or for bulk cloud cover estimation Confidence: tentative
Def: :Positive impact expected but not yet validated due to lack of suitable data and/or models