# Mathematical Gravity Modeling Advancement

Canonical: https://abierto.us/opportunities/hm0476magma

- Solicitation number: HM0476_MaGMA
- Notice type: Solicitation (first published as presolicitation)
- Status: Closed. Deadline was July 23, 2026 at 2:00 PM EDT
- Department: Department of Defense
- Agency: National Geospatial-Intelligence Agency (Nga)
- Contracting office: Natl Geospatial-Intelligence Agency (HM1575)
- NAICS: 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- Product or service code: AJ12 General Science And Technology R&D Services; General Science And Technology; Applied Research
- Place of performance: Saint Louis, Missouri
- First posted: April 15, 2026
- Last posted: July 2, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/ad98854f82154cb39ac0cadc98790e6e/view

## Description

The National Geospatial-Intelligence Agency (NGA) requires specialized research and software development services to enhance advanced gravimetric and planetary modeling capabilities. The prospective vendor will be required to provide supplies and services in the following core areas:

**Planetary Modeling:** Develop high-fidelity, variable-resolution planetary models (for Earth and other planetary bodies) with complex density variations to validate derived gravimetric quantities.

**Software Development & Optimization:** Integrate, improve, and optimize NGA-provided analytic continuation code, evaluating it for parallel computation and operational use.

**Algorithm Development:** Research and implement memory-efficient computational techniques (e.g., out-of-core inverse methods) for estimating spherical harmonic expansion (SHE) model coefficients.

**Exploratory Research:** Collaborate with NGA Subject Matter Experts (SMEs) to evaluate and investigate new mathematical, modeling, and algorithmic techniques that align with the overall project goals. For full technical specifications, baseline code parameters, and validation methodology requirements, please refer to the attached solicitation documents.

## Publications

- April 15, 2026: Presolicitation, due April 30, 2026 at 1:00 PM EDT. Notice 9fa00843474243e69dfb534ef8dfd8f7. https://sam.gov/workspace/contract/opp/9fa00843474243e69dfb534ef8dfd8f7/view
- July 2, 2026: Solicitation, due July 23, 2026 at 2:00 PM EDT. Notice ad98854f82154cb39ac0cadc98790e6e. https://sam.gov/workspace/contract/opp/ad98854f82154cb39ac0cadc98790e6e/view

## Points of contact

- Nathan G. Huber, nathan.g.huber@nga.mil, 3146761624
- Matthew A Hoffman, matthew.a.hoffman@nga.mil, 3146762081

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/hm0476magma.