Attachment1_Gravity_Meter_SOW.pdf

UNCLASSIFIED

DYNAMIC GRAVITY METER PURCHASE FOR

THE OFFICE OF GEOMATICS

Statement of Work (SOW)

August 21, 2025

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Contents

1 BACKGROUND AND SCOPE

2 REQUIREMENTS

3 SPECIFICATIONS

4 TRAINING

5 GRAVITY METER DELIVERY

6 DELIVERABLES

7 TRAVEL

8 SECURITY

9 QUALITY ASSURANCE

10 INVOICING

11 PERIOD OF PERFORMANCE

12 CONTRACTING OFFICER REPRESENTATIVE (COR)

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1 Background and Scope

The National Geospatial-Intelligence Agency (NGA) delivers Geospatial Intelligence (GEOINT) information that provides a decisive advantage to policymakers, warfighters, intelligence professionals, humanitarian efforts and first responders. NGA supports the National System for Geospatial Intelligence (NSG), which supports our Department of Defense (DoD), Department of Homeland Security and the Intelligence Community. NGA leads the world in timely, relevant, accurate and actionable GEOINT.

NGA also creates the Earth Gravitational Model for use in navigation products for the DOD and general use for industry and academia. The Earth Gravitational Model contains gravity survey data from all over the world. Acquiring more gravity survey data improves this model. The gravity meter loan program is a source of this gravity data for NGA. NGA loans gravity meters to academia, government agencies, and private companies in exchange for the gravity data they collect. NGA is looking to update their gravity meter inventory with new, ITAR restriction-free gravity meters. NGA is therefore seeking a company that is capable of manufacturing and servicing airborne and marine gravity collection systems for use in small-type aircraft and marine vessels respectively to perform geophysical surveys to collect the magnitude of the earth’s gravity field for global and regional gravity models.

2 Requirements

The contractor shall build and deliver Marine and Airborne based dynamic gravity meters meeting NGA technical requirements. The contractor shall provide a complete owners/operator manual of the gravity meter system with the first delivery, this is to include a standard operating procedure (SOP) or “how to” of gravity data processing with the meters and any associated/proprietary software. The contactor shall also provide 3 days of training for each meter purchased.

3 Specifications

3.1 The following are the minimum technical specifications:

Airborne Marine

Sensor Type Full-feedback Zero Length Spring Full-feedback Zero Length Spring

Range Worldwide capability Minimum:

20,000 mGals without reset

Worldwide capability Minimum:

20,000 mGals without reset

Drift Not more than 3 mGals/month Not more than 3 mGals/month

External Sensor Power Pack (to maintain ‘out-of-gimbal’ power)

Required Required

Maximum time to operational temperature stability

24 hours 24 hours

Platform

Gimbal Pitch Minimum 30° Minimum 30°

Gimbal Roll Minimum 30° Minimum 30°

Gimbal Lock Required: Manual Optional: System controlled

Required: Manual Optional: System controlled

Control System

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Computer 2 PCs or Tablets, a primary and a back up

2 PCs or Tablets, a primary and a back up

Software License Perpetual, included Perpetual, included

Software Modes Calibration, Collection, Replay Calibration, Collection, Replay

Data Format Raw ASCII Raw ASCII

Output processed value Full field gravity (inclusive of gravity meter and geophysical corrections)

Full field gravity (inclusive of gravity meter and geophysical corrections)

Data Recording Frequency Minimum: 10Hz Minimum: 1Hz

Secondary Raw Data Recording Independent of Computer Independent of Computer

GPS and/or INS Equipment Included with gravity meter N/A

System Performance

Resolution Minimum: 0.01 mGals Minimum: 0.01 mGals

Repeatability (Static) 0.05 mGals 0.05 mGals

Repeatability (Dynamic)

0.25 mGals @ 50,000 mGals horizontal

0.25 mGals @ 50,000 mGals horizontal

Accuracy Minimum: 0.7 mGals Minimum: 0.7 mGals

Turn Recovery Time 3 minutes 3 minutes

Design

Power Requirements

Nominal: 70 Watts Maximum: 250 Watts Input: 80-265 VAC, 50/60Hz Input: 20-32 VDC

Nominal: 70 Watts Maximum: 250 Watts Input: 80-265 VAC, 50/60Hz Input: 20-32 VDC

Weight Functional System, not to exceed:

200lbs. UPS: Not to exceed 75lbs

Functional System, not to exceed:

200lbs. UPS: Not to exceed 75lbs

Dimensions

System must pass through typical sized aircraft doors and fit inside geophysical surveying aircraft without frame disassembly (e.g.

Cessna Caravan). Dimensions of the gravity meter shall not exceed: 28(l) x 22(w) x 33(h) inches

System must pass through typical sized geophysical survey ship hatch doors without frame disassembly.

Dimensions of the gravity meter shall not exceed: 28(l) x 22(w) x 33(h) inches

Mounting Plate Airplane mounting plate Marine mounting plate

Operating Temperature 5°C to 50°C 5°C to 50°C

Storage Temperature -10°C to 50°C -10°C to 50°C

Spare parts

Spare parts

Spare power module Spare system control unit Air dampers (2) Spare suspension bungees (4) Spare air cushion mounts (8) Spare Control System Laptop Hardware (nuts, bolts, fasteners)

Spare power module Spare system control unit Air dampers (2) Spare suspension bungees (4) Spare air cushion mounts (8) Spare Control System Laptop Hardware (nuts, bolts, fasteners)

Customer Service

Warranty 2 Year Parts and Labor 2 Year Parts and Labor

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3.2 Preference is for major components (e.g. Sensor, Electronic packages, Control Systems, Software) to be interchangeable between the same type of platform (e.g. airborne to airborne) and across different platforms (e.g. airborne to marine, marine to airborne) with minimal setup and adjustments by users.

3.3 Provide a minimum of 5 windows based rugged (durable computer designed to withstand marine and airborne environmental conditions and rough handling) laptops. Laptops shall contain software and licenses of the contractor’s collection and processing software and any proprietary scripts or data processing software produced by the contractor. These laptops are in addition to the 2 control system laptops/tablets provided with each meter.

4 Training

4.1 The purchase of each gravity meter shall include three (3) days of training. The first training session for the first marine gravity meter and first airborne gravity meter shall include but is not limited to the following:

• Gravity meter unpacking and assembly procedure

• Component inspection

• Component replacement

• Gravity meter installation procedure

• System power on procedure

• Gravity meter storage

• Gravity meter shipment

• Overview of data acquisition software and operation procedure

4.2 The contractor shall not repeat the material and training from previous sessions. After the initial training for each meter additional training topics and dates shall be agreed upon by both the contractor and NGA. Additional topics may include assisting NGA’s Meter Loan Program participants with installing the gravity meter on survey aircraft or vessel. Training may occur at NGA, the contractor’s facility, or at facilities housing survey aircraft and vessel where the meters will be installed. Any unused training time shall not expire.

5 Gravity Meter Delivery

5.1 The contractor shall ship the gravity meters to the following address:

National Geospatial-Intelligence Agency Office of Geomatics

Mail Stop M-03 c/o Alicia Metzger 2301 Cass Ave.

St. Louis, MO 63106

5.2 The contractor shall ship all meters for each order at the same time and provide email notification of delivery shipment to the Contracting Officer Representative (COR)

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6 Deliverables

6.1 Quality Assurance Surveillance Matrix

SOW Paragraph and Requirement

Performance Standards

Acceptable Quality Levels

Surveillance Method

Surveillance Frequency

SOW 2, 3 Gravity Meters

Delivery of gravity meters meeting technical requirements in section 3, including 2 control system laptops/tablets per meter

100% Physical inspection of meters

Upon delivery of meters

SOW 3.3 Rugged Laptops

Delivery of the 5 additional rugged laptops with software and licenses

100% Physical inspection of laptops

Upon delivery of first order

SOW 2, Manuals Delivery of the owners/operator manual of the gravity meter system

100% Visual Inspection Upon initial delivery of each meter type (Marine and Airborne)

SOW 2, 4 Training Three days of training per purchased meter

100% Completion of Training

Upon agreement between contactor and NGA

7 Travel

Should travel to government/military installations be required to provided hands-on training to install the gravity meters on survey aircraft and vessels, access to these facilities will be coordinated between the contractor, NGA, and installation POC.

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8 Security

8.1 This work is unclassified, uncleared contractor personnel are authorized to work on this contract.

8.2 Uncleared contractor personnel visiting NGA facilities or other sites may receive the appropriate visitor badge and be escorted, as appropriate. The vendor shall return the visitor badge at the end of each visit day.

9 Quality Assurance

The vendor is responsible for product/service quality as it pertains to all requirements under this SOW.

The vendor shall take all steps necessary to ensure that the content meets all quality and specification aspects required by NGA.

10 Invoicing

The vendor shall submit invoices to NGA after each delivery.

11 Period of Performance

11.1 The overall PoP includes a 5-year base ordering period (60 months). The Government may purchase products as described in the SOW herein at any time during the contract ordering period.

11.2 The Government anticipates ordering three (3) meters per year over the 5-year ordering period.

Orders will be a mix of marine and airborne gravity meters; NGA will determine which type is required.

12 Contracting Officer Representative (COR)

Chris Pulcher 314-676-5168 Christopher.C.Pulcher@nga.mil