NASA's National Aeronautics and Space Administration (NASA) is seeking to procure 90 Vaisala radiosondes and antenna preamplifiers for use at the SHADOZ ozonesonde stations in Natal, Brazil, and Hanoi, Vietnam. This procurement aims to support the continuation of multi-decadal balloon-borne ozone profile records, which are crucial for satellite validation, ozone and pollution trend analysis, and climate studies. The requested Vaisala equipment is essential for maintaining consistency with existing SHADOZ records and ensuring compatibility with current ground data collection systems. Interested organizations must submit their capabilities and qualifications in writing to Cody Guidry by 3:00 p.m. Central Standard Time on August 12, 2025, as the government intends to issue a sole source contract to Vaisala Inc. for this requirement.

SATPC0039454 TAB 04 4 SOW.pdf

This Statement of Work outlines the need for 90 Vaisala radiosondes and ozone interface kits, plus a replacement antenna preamplifier, for the Natal, Brazil, and Hanoi, Vietnam, SHADOZ ozonesonde stations. These stations require the equipment to continue their multi-decadal balloon-borne ozone profile records, which are vital for satellite validation, ozone and pollution trend analysis, and climate studies. The Vaisala equipment is specifically requested to maintain consistency with existing SHADOZ records and ensure compatibility with current ground data collection systems. Operators at both stations will launch the radiosondes, collect data, and send it to NASA/GSFC. The order covers an approximately one-year supply, expected to be used from August 2025 to July 2026.

**Synopsis:**

NASA/NSSC has a requirement for 90 Vaisala radiosondes and antenna preamplifier for Natal and Hanoi.

NASA/NSSC intends to issue a sole source contract to VAISALA INC: 194 S TAYLOR AVE; LOUISVILLE, CO 80027 under the authority of FAR 13.106-1(b)(1)(i). It has been determined that VAISALA INC is the sole provider of 90 Vaisala radiosondes and antenna preamplifier for Natal and Hanoi.

NASA/NSSC will be the procuring center for this effort.  Performance will be located at NASA/ Goddard Space Flight Center (GSFC).

The Government intends to acquire commercial items and services using the provisions, clauses and procedures prescribed in FAR Part 12 and FAR Part 13.

The NAICS Code for this procurement is 334516.

Interested organizations may submit their capabilities and qualifications to perform the effort in writing to the identified point of contact no later than 3:00 p.m. Central Standard Time on 8/12/2025. Such capabilities/qualifications will be evaluated solely for the purpose of determining whether or not to conduct this procurement on a competitive basis. A determination by the Government not to compete this proposed effort on a full and open competition basis, based upon responses to this notice, is solely within the discretion of the government.

Oral communications are not acceptable in response to this notice.

NASA Clause 1852.215-84, Ombudsman, is applicable. The Center Ombudsman for this acquisition can be found at http://prod.nais.nasa.gov/pub/pub\_library/Omb.html .

Primary Point of Contact:

Cody Guidry

Procurement Specialist

Cody.d.guidry@nasa.gov

Secondary Point of Contact:

Tiffany Neal

Contracting Officer

Tiffany.neal@nasa.gov

Buyer

NAICS

PSC

Original Source