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IDIQ for the purchase of instruments and probes in support of NOAA’s XBT Network

Atlantic Oceanographic and Meteorological Laboratory

Statement of Work

Preparation date October 2019

Background The Expendable Bathythermograph (XBT) Network is an international effort that supports the implementation of a network of cargo vessels, cruise ships, and research vessels to deploy scientific instruments that collect oceanographic observations. As part of the XBT Network, the Atlantic Oceanographic and Meteorological Laboratory (AOML) has the responsibility to provide XBT temperature measurements that are used to monitor changes of key surface and subsurface currents, to study meridional heat transport in all ocean basins, and to supplement other observational platforms to assess the variability of the upper ocean heat content. XBTs are deployed along fixed, pre-established transects, which are repeated at least 4 times per year, to measure the water temperature from the sea surface to a maximum depth of 850 m. On average, approximately 15,000 XBTs are deployed per year, of which AOML is involved in about 90% of some of the aspect of the logistics, operations, data processing, etc. AOML leads or co-leads with its international collaborators the implementation and operations of 12 Atlantic Ocean transects. Most of the data obtained though this project are distributed onto the Global Telecommunication System (GTS) within 24 hours of its acquisition, thereby providing critical input to weather and climate forecasts models and scientific applications. Additional scientific quality control is carried out at AOML to provide data with quality for climate studies. These data are distributed to NOAA/NODC and to other data distribution centers.

Scope The AOML requires a vendor to provide probes, recording instruments and other related supplies in support of the XBT Network. Instruments and probes purchases under the terms of this contract will be used by NOAA and its partners, in support of the XBT network.

Technical Requirements

Vendor must provide items that meet the following requirements:

1) XBT probes capable of measuring:

· Temperature profiles of at least 750 m at ship speeds of 20 knots or more

· Temperature profiles of at least 1000 m at ship speeds of 20 knots or more

· Temperature profiles of at least 1800 m at ship speeds of 6 knots or more

· Temperature profiles with vertical resolution of 70 cm or better and accuracy of 0.1 C

· Conductivity measurements between 0 and 70 mS/cm, with a resolution of 0.02 mS/cm or better, and accuracy of 0.03 mS/cm.

2) XCTD probes capable of measuring:

3) Recording equipment capable of:

· Recording temperature profiles using the above mentioned probe types

· Easy integration to the operation of automatic probe launchers

· Recording temperature profiles with accuracy of 0.2°C, temperature resolution of 0.01°C, at a temperature range of -2 to 35°C for XBT probes.

· Recording temperature and salinity profiles from Expendable Conductivity / Temperature / Depth (XCTD) probes.

Tasks Delivery orders will be created one or more times every year for the purchase of probes and other instruments listed in Table 1.

Table 1: List of model and part numbers of the instruments to be purchased under this contract, including estimated annual quantity and annual quantity limits.

Delivery The contractor is expected to supply the instruments identified in Table 1 up to the maximum quantity indicated. Delivery is expected within 6 months of the completion and receipt of a delivery order. A Government Bill of Lading (GBL) or Commercial Bill of Lading (CBL) for shipping cost shall be provided by AOML.

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