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: Travis M Duhart. 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 Close of Business (COB), January 4, 2010, a Sole Source purchase order will be pursued with Lockheed Martin Sippican, Inc., 7 Barnabas Rd., Marion, MA 02738