Applicant Name
Name of Applicant:  University of Washington

Attention: Michael McCarthy
Street Address: Box 351310
P.O. Box:
City: Seattle
State: WA
Zip Code: 98195
E-Mail Address: mccarthy@u.washington.edu

Best Contact
Give the following information of person who can best handle inquiries pertaining to this application:  
Last Name: McCarthy
First Name: Michael
Title: Research Associate Professor
Phone Number: 2066852543

Please explain in the area below why an STA is necessary:
On 26Dec07, Tony Serafini of the FCC Office of Engineering and Technology Experimental Licensing Branch responded to an inquiry I had made, suggesting the STA was an appropriate tool for my application. An infrequent transmitting activity, which I had assumed was permitted, was recently identified as possibly not permitted. This activity, as explained below, is for university and high school level educational purposes. It uses a low power 433MHz transmitter with an omni-directional antenna. I would like to be able to continue this activity with the appropriate permissions.

Purpose of Operation
Please explain the purpose of operation:  Research in atmospheric structure and radio communications using a transmitter as a sounder to make atmospheric temperature profiles and as a beacon to recover the transmitter. The purpose is to provide a simple inexpensive means for students to learn about radio communications and atmospheric structure. I help teach a class at University of Washington in which we use a low power radio transmitter in three exercises. One exercise, in a laboratory, is to build a circuit to modulate (OOK) an inexpensive off-the-shelf 433MHz SAW transmitter (hybrid circuit) using a 555 timer, whose pulse rate is temperature dependent. As a second exercise, we launch one of these student-built circuits on a 3ft helium balloon and use the received signal to provide a sounding of the atmospheric temperature profile from sea level to about 50000 feet. This measurement is done in conjunction with lectures about atmospheric structure. Students help set up receiver station, launch the balloon, and then analyze the recovered data. Finally, we use the device as a beacon, together with direction-finding equipment, to locate and recover a larger balloon payload which carries student-designed instrumentation into the stratosphere. The tracking/recovery is done after the balloon pops and returns to Earth. I have also done parts of this exercise as a volunteer at a local high school.

Callsign: WF9XPG
Class of Station: MO
Nature of Service: Experimental

Requested Period of Operation
Operation Start Date: 04/26/2012
Operation End Date: 05/20/2012

List below transmitting equipment to be installed (if experimental, so state) if additional rows are required, please submit equipment list as an exhibit:  
Manufacturer Model Number No. Of Units Experimental
NA NA 4 Yes

Neither the applicant nor any other party to the application is subject to a denial of Federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. Section 862, because of a conviction for possession or distribution of a controlled substance. The applicant hereby waives any claim to the use of any particular frequency or electromagnetic spectrum as against the regulatory power of the United States because of the prvious use of the same, whether by license or otherwise, and requests authorization in accordance with this application. (See Section 304 of the Communications Act of 1934, as amended.) The applicant acknowledges that all statements made in this application and attached exhibits are considered material representations, and that all the exhibits part hereof and are incorporated herein as if set out in full in this application; undersigned certifies that all statements in this application are true, complete and correct to the best of his/her knowledge and belief and are made in good faith. Applicant certifies that construction of the station would NOT be an action which is likely to have a significant environmental effect. See the Commission's Rules, 47 CFR1.1301-1.1319.
Signature of Applicant (Authorized person filing form): Michael McCarthy
Title of Applicant (if any): Research Associate Professor
Date: 2012-03-29 00:00:00.0

Station Location
City State Latitude Longitude Mobile Radius of Operation
North  47  39  12 West  122  18  21 Free-flying balloons launched from Seattle and from Moses Lake airport (Washington state) 500.00
Datum:  NAD 83
Is a directional antenna (other than radar) used?   No
Exhibit submitted:   No
(a) Width of beam in degrees at the half-power point:  
(b) Orientation in horizontal plane:  
(c) Orientation in vertical plane:  
Will the antenna extend more than 6 meters above the ground, or if mounted on an existing building, will it extend more than 6 meters above the building, or will the proposed antenna be mounted on an existing structure other than a building?   No
(a) Overall height above ground to tip of antenna in meters:  
(b) Elevation of ground at antenna site above mean sea level in meters:  
(c) Distance to nearest aircraft landing area in kilometers:  
(d) List any natural formations of existing man-made structures (hills, trees, water tanks, towers, etc.) which, in the opinion of the applicant, would tend to shield the antenna from aircraft: The antenna is part of an FAA compliant flying payload that is not regarded as harmful to aircraft, due to its small size and mass.
Action Frequency Station Class Output Power/ERP Mean Peak Frequency Tolerance (+/-) Emission Designator Modulating Signal
New 433.84500000-433.99500000 MHz MO 18.000000 mW 25.000000 mW M 1K50L3D 0.5--600 Hz OOK