WiliamW.. .Ke : NCAR-TN-16 Boundary Layer Profile Measurement System C. P. EDWARDS E. Bollay Associates, Inc. Boulder, Colorado March 1966 I UBIRRY _ . . i_ .. ;: NCAR:! Technical Notes _____ - NATIONAL CENTER FOR ATMOSPHERIC RESEARCH Boulder, Colorado ; i NCAR Library E 1 1: \.,,ulnllltl
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WiliamW.. .Ke :
NCAR-TN-16
Boundary Layer ProfileMeasurement System
C. P. EDWARDSE. Bollay Associates, Inc.Boulder, Colorado
March 1966
I UBIRRY
_ . .i_ .. ;: NCAR:! Technical Notes _____-NATIONAL CENTER FOR ATMOSPHERIC RESEARCH
Boulder, Colorado
; i NCAR Library
E 1 1: \.,,ulnllltl
The National Center for Atmospheric Research (NCAR) is dedicated to the advancement ofthe atmospheric sciences for the benefit of mankind. It is operated by the University Corpora-tion for Atmospheric Research (UCAR), a private, university-controlled, non-profit organization,and is sponsored an4.principally funded by the National Science Foundation.
NCAR shares with other atmospheric research groups four interrelated, long-range objectivesthat provide justification for major expenditures of public and private funds:
· To ascertain the feasibility of controlling weather and climate, to develop the tech-niques for control, and to bring about the beneficial application of this knowledge;
* To bring about improved description and prediction of astrophysical influences onthe atmosphere and the space environment of our planet;
· To bring about improved description and prediction of atmospheric processes andthe forecasting of weather and climate;
* To improve our understanding of the sources of air contamination and to bringabout the application of better practices of air conservation.
The research and facilities operations of NCAR are conducted in four organizational entities:The Laboratory of Atmospheric SciencesThe High Altitude ObservatoryThe Facilities DivisionThe Advanced Study Program
All visiting scientist programs and joint-use facilities of NCAR are available to scientists fromUCAR-member and non-member institutions (including private and government laboratories inthe U.S and abroad) on an equal basis. The member universities of UCAR are:
University of Alaska Florida State University Pennsylvania State UniversityUniversity of Arizona University of Hawaii Saint Louis UniversityUniversity of California The Johns Hopkins University Texas A and M UniversityUniversity of Chicago Massachusetts Institute of Technology University of TexasColorado State University University of Michigan University of UtahUniversity of Colorado University of Minnesota University of WashingtonCornell University New York University University of Wisconsin
NCAR-TN-16
Boundary Layer ProfileMeasurement System
C. P. EDWARDSE. Bollay Associates, Inc.Boulder, Colorado
March 1966
.(. ./A
NATIONAL CENTER FOR ATMOSPHERIC RESEARCHBoulder, Colorado
.. '. '• •. '.'. ^~~~~~~~~~~~~~~~~~~~~~~
I
iii
PREFACE
This report presents a brief survey of the capabilities of a new
tethered-balloon system for making meteorological measurements of the
boundary layer profile up to 5000 ft above the ground. The airfoil
balloon is designed to maintain altitude in the face of winds at flight
altitude.. The system was developed by E. Bollay Associates, Inc.,
Boulder, Colorado, under subcontract to NCAR. The author is a staff
member of E. Bollay Associates, Inc.
The system is available to meteorologists at other institutions
for cooperative research use. Detailed information can be obtained from
the Field Observing Facility of the National Center for Atmospheric
Research, Boulder, Colorado.
I
BOUNDARY LAYER PROFILE MEASUREMENT SYSTEM
The NCAR Field Observing Facility has developed a tethered-balloon
wing system to accurately measure the vertical profile of temperature,
wind speed, wind direction, and humidity. Readings can be made up to
5000 ft above the ground (for ground elevations up to at least 5000 ft
ASL).
The system consists of a Mylar balloon wing, a 2-lb telemetry
package, an electrically operated winch, and a ground receiver with
magnetic tape recorder.
The balloon wing (Fig. 1) contains approximately 112 cu ft of
helium and is designed so that it does not require FAA waivers to FAR,
Part 101. It is not difficult to launch and is rigged in a unique