NASA/Goddard Space Flight Center, Code 219, Greenbelt, MD 20771

F -- SEVEN (7) DAY SHIP TIME ON RESEARCH VESSEL TO MEASURE SURFACE SALINITY OF GULF STREAM SOL 971-76943-902 DUE 071598 POC Deborah A. Bittner, Contract Specialist, Phone (301) 286-5387, Fax (301) 286-1739, Email Deborah.A.Bittner.1@gsfc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/GSFC/date.html#971-76943-902. E-MAIL: Deborah A. Bittner, Deborah.A.Bittner.1@gsfc.nasa.gov. THIS NOTICE CONSTITUTES AMENDMENT NO. 2 TO THE COMBINED SYNOPSIS/RFQ FOR Seven (7) Day Ship Time on Research Vessel to Measure Surface Salinity of Gulf Stream. Companies shall acknowledge all amendment(s) in their quote. This notice serves as the official amendment to subject synopsis/RFQ and a written amendment will not be issued. The purpose of this amendment is to clarify specifications and answer questions received. The maximum distance from the coast to be included in the testing is 250 -- 300 n ml. The maximum continuous days of operation is 7, and in order to complete the desired offshore survey, the vessel will not have time to return to port and refuel. We prefer to have our own personnel on board as well as a fully competent technical staff who have experience with the instruments and data acquisition systems on board. Our scientific party will consist of 8-12 people, two of whom are women and will require a seperate cabin. Sampling requirements are as follows: 1) We plan to take continoustemperature and conductivity measurements, with precicions of .001 deg C and 0.0003 S/m^2 respectively, of the water coming in the ship intake by using a thermosalinograph. This will allow us to sample salinity within a meter or so of the surface while steaming at cruising speed. The sampling equipment must be provided and installed by the ship provider and the data must be continuously logged in a computer file; 2) Just below cruising speeds (roughly 10 kn or less), we plan to tow an undulating 'flying' CTD system to measure temperature and salinity in the upper 100-200 m of the water column. These measurements will be used to relate the near-surface temperature and salinity fields to thhe fields in the upper water column. The towed CTS system must be provided by the ship. The data must be continuouly logged in a computer file; 3) At lower speeds (<5 kn), we plan to make towed near-surface (within the upper ft) temperature and salinity measurements and we need the ship to provide the sampling equipment (see precision requirements above); 4) We plan to briefly stop on station while the NASA P3 flies overhead and we plan to make a near surface salinity profile measurement (5 cm sampling depths down to .5 m) and we require support from the ship to provide a device to do the sampling (see precision requirements above); 5) We require a 300 kHz RDI hull mounted acoustic doppler current profiler (ADCP) for measuring velocities in the upper 100 m of the water column to relate salinity patterns to advection. The ADCP system must be interfaced to the ship's gyro compass and differential GPS. The data must be continously logged in a computer file; 6) We require continuous logging of the following meteorological data: both relative and absolute wind speed and direction, air temperature and humidity, solar radiation (PAR), and barometric pressure; 7) We require continuous logging of the ship's gyro compass heading and differential GPS positions in a computer file; 8) All of the computer logged data should be provided in simple ascii format suitable for importation into spreadsheet programs. The vendor should provide full documentation of all of the logged parameters. The data needs to be available in real-time for analysis; 9) The ship should have the capability (e.g. having IMARSAT-C transmitter/receiver) of sending data to shore as text files. It should also be capable of sneding and receiving faxes. We need to be able to transmit data to shore so that ground truth verification can be made after each NASA P3 overflight. We need fax capability to send and receive plotted data, such as near real-time AVHRR images; and 10) We would like to have a conventional CTD/Rosette system avaiable for our use. Other special requirements not address in the synopsis are: the vessel and crew must conform to the University -- National Oceanographic Laboratory Sysem (UNOLS) research vessel safety standards. These standards are available at: http://www.gso.uri.edu/unols/saf stand/saf stand.html. There are guidelines at the web site about how non-UNOLS vessels can meet these standards. The due date for receipt of offers is extended to July 15, 1998. Companies shall provide the information stated in the synopsis/RFQ posted on the NASA Acquisition Internet Service (NAIS) on [ENTER DATE]. Documents related to this procurement are available over the Internet and are in Microsoft Office Suite (Word 6.0, Excel 5.0, or PowerPoint 4.0) format and reside on the World Wide Web (WWW) server which may be accessed using a WWW browser application. The WWW address or URL of the NASA/GSFC Business Opportunities home page is http://procurement.nasa.gov/EPS/GSFC/class.html. (0173)

Loren Data Corp. http://www.ld.com (SYN# 0034 19980624\F-0006.SOL)