There are Three Original Primal Order Sound Fields that make up the Ray Aspects of our entire Universal creation in the Universal Time Matrix. Collectively these are also referred to as the Founders and the Threefold Founder Flame that make up the GSF Triad. 
This Ray Aspect of Illumination is another way to describe the higher intelligence field access we are able to receive when being connected into another dimensional frequency. Higher dimensions hold higher energetic frequencies which emits an "intelligence field". There are massive multiple layers of "intelligence fields" and humans have the consciousness power (when disciplined or trained to develop these abilities) to build discernment from where the intelligence is being sourced from.
Term first found in HGS Manual: Page 66