icy - infr
- icy wind
- ideal climate
- ideal fluid
- ideal gas
- ideal horizon
- ideal liquid
- ideal-gas laws
- identification
- IFOV
- IFR weather
- ig
- igloo
- igneous meteor
- IGW
- IGY
- ill-posed problem
- ill-posedness
- illuminance
- illumination
- illumination climate
- illumination intensity
- illuminometer
- image alignment
- image compression
- image degradation
- image dissector camera system
- image enhancement
- image gridding
- image intensifier
- image mutual coherence function
- image navigation
- image plane
- image plane scanner
- image processing (system)
- image reconstruction
- image resolution
- image scale factor
- image segmentation
- image transform
- image-forming receiver
