jenkfgdas_eobs.ecf (GFS v17) — Deep-Dive Analysis

Path: ecf/scripts/enkfgdas/analysis/create/jenkfgdas_atmos_ens_observer.ecf | Date: 2026-06-11 Note: Renamed from eobs to atmos_ens_observer in v17.

Summary

EnKF observation selection (EOBS) — computes observation-space innovations (O-F) for all ensemble members. Runs GSI in "observer mode" to generate the observation data selection needed by the EnKF update (eupd).

Resources: 4 nodes, 50 mpi x 2 OMP = 100 cpus/node, exclusive, 25-min wall

Modules: gsi | J-Job: JGLOBAL_ENKF_SELECT_OBS

v17-specific notes

• Prerequisite for eupd — must run first to generate observation-space data.
• 4 nodes (moderate) — runs GSI observer on ensemble mean.
• 25-min wall — faster than full analysis since no minimization.