SUBJECT: NOTICE OF INTENT TO AWARD A SOLE SOURCE PROCUREMENT FOR Radiosondes with the following specifications. Transmitter Type: Digitally Synthesized Frequency Range: 400 to 406 MHz Frequency Stability, 90% Probability: In Accordance with EN302054V1.1.1 Deviation, Peak-to-Peak: 5 kHz Emission Bandwidth: In Accordance with EN302054V1.1.1 Output Power: 63 mW (nominal) Modulation: GFSK Data Downlink: 4800 Baud, Digital Operator Selectable Frequencies: Sixteen (16); Nominally 125 kHz Steps; Set by Switch. Sampling Rate All parameters once per second. Power Source Lithium battery pack; suitable for 130 minutes of operation. Sensor Calibration Polynomial coefficients resident in sonde EEPROM are transmitted continuously in digital data-stream. Pressure (Derived from Differentially Corrected GPS Geometric Height Values) Measuring Range: 1080 hPa to 3 hPa Accuracy: Better than 0.5 hPa (rms) Resolution: 0.1 hPa Temperature Sensor Type: Chip Thermistor Range: -90oC to +60oC Accuracy: 0.2oC (2 sigma) 0.3oC (2 sigma) in daylight above 20 kms Response Time (63.2%, 6 m/s): 1000 hPa < 0.75 Secs 10 hPa < 8 Secs Resolution: 0.1oC Humidity Sensor Type: Capacitance Range: 0 to 100% RH; +45oC to -60oC Accuracy: +/-5% RH (2 sigma) up to 20 hPa Response Time: 1000 hPa, 6 m/s, +25 oC < 1.5 Secs 1000 hPa, 6 m/s, -10 oC < 10 Secs 1000 hPa, 6 m/s, -40 oC < 50 Secs Resolution: 1% RH Code Correlating GPS Receiver Number of Channels: 12 Cold Start Acquisition Time: 45 Secs (nominal) Reacquisition Time: 0.1 Secs (nominal) Range: 0 to 100% RH; Dimensions: 127 x 152 x 76 (mm) Weight 235 grams (including battery, dereeler, & cord) DESC: INTENT TO AWARD A SOLE SOURCE PROCUREMENT WITH Lockheed Martin Sippican, Inc.. The Air Force, Edwards Air Force Base, CA intends to award a Sole Source purchase order to Lockheed Martin Sippican, Inc., 7 Barnabas Rd., Marion, MA 02738. The Sole Source purchase will be for 180 Radiosondes, Part Number 1848-611 LMS6 Sondes. Please note that this is not a request for competitive proposals. However, all interested parties who believe they can meet the requirements are invited to submit in writing complete information describing their ability to provide radiosondes matching the above specifications. Responses may be sent via e-mail to [email protected] or mailed to AFFTC/PKDE, 5 South Wolfe Ave, Edwards AFB, CA 93524-1185, Attention: Antonie J. Markham. Fax Number: 661-275-0470. Information received as a result of this notice will be considered solely for the purpose of determining whether to conduct a competitive procurement. A determination by the Air Force not to open the requirement to open competition, based on response to this notice, is solely within the discretion of the Air Force. If the office has not received any affirmative written responses by the morning of 20 March 2012, a Sole Source purchase order will be pursued with Lockheed Martin Sippican, Inc., 7 Barnabas Rd., Marion, MA 02738

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