RAID is part of the Instrument Development and Demonstration, and is a 3-year program to support development of an airborne instrument. RAID builds on the disruptive and proven Quantum Rydberg Receivers (QRR) technology. RAID integrates QRR with a broadband reflector and resonators to obtain state-of-art sensitivity, low-noise, and ultra-broadband sensing with quantum down-conversion – with no conventional antenna/RF front-end/mixers, and in a compact detector volume. Configured in an airborne P3B platform, RAID will demonstrate the first airborne multi-band radar remote sensing with state-of-art atomic sensors. Configured as a signal-of-opportunity receiver it has vast flexibility to focus on dynamics/ transients. RAID will result in multi-science applicability for future remote sensors. The proposal is to advance the development and maturity of Quantum Rydberg Receivers (QRR) and conduct the first airborne remote sensing demonstrations with RAID (Rydberg Airborne Instrument Demonstration). Our focus is to measure the vertical profile of land surface wetness (LSW) in land surface hydrology (LSH) science. We include an exploratory focus on topography for Surface, Topography, and Vegetation (STV). RAID will use a P3 platform (see Fig. 1-1) and uses six low-frequency radar bands from VHF/I-to-C (137MHz/260MHz/360MHz/ 1.5GHz/2.3GHz/3.9GHz), and three high-frequency bands from Ku-K (12.4/18.5/20.7GHz). Radio reflectometry techniques for signals-of-opportunity (SoOp) are used to obtain vegetation water content (VWC) from canopy/vegetation, and soil-moisture content (SMC) from the soil to deep-root-zone (see Fig. 1-2). Downlink satellite radio signals with modulated data from five classes of communication/navigation satellites are used. QRR uses microwave (MW)-dressed Rydberg spectroscopy to obtain amplitude and phase of an impinging RF signal in a dynamically selected band via a coupler (~510nm) and probe (~852nm) laser. Detected probe signaling directly down-converts the SoOp signaling to baseband, which is sampled and processed by a digital system. RAID consist of dual QRRs, positioned in the zenith and nadir directions to detect direct and ground reflected SoOps. After direct and ground signal correlation, the Delay Doppler Map (DDM) technique and reflection-coefficient retrievals are applied. During the 36-month period, the team will develop the instruments and systems for integration to an airborne platform and conduct 3 flights over the NSF NEON Site. The instrument design enables use/reuse in future NASA airborne campaigns and will support Earth Science Decadal Survey RFI inputs.