A RAINFALL MEASUREMENT DEVICE USING UNDERWATER ACOUSTIC SIGNALS

Award Information
Agency:
Department of Energy
Branch:
N/A
Amount:
$49,173.00
Award Year:
1987
Program:
SBIR
Phase:
Phase I
Contract:
N/A
Agency Tracking Number:
6986
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Creare Inc
Po Box 71, Etna Rd, Hanover, NH, 03755
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
072021041
Principal Investigator
 DR FREDERIC LAVILLE
 (603) 643-3800
Business Contact
Phone: () -
Research Institution
N/A
Abstract
MEASUREMENTS OF RAINFALL OVER LARGE BODIES OF WATER SUCH AS LARGE LAKES OR OCEANS ARE MADE INFREQUENTLY BECAUSE OF THE LACK OF AN ACCURATE MEASURING DEVICE. A LARGE PORTION OF THE EARTH'S PRECIPITATION FALLS OVER THE OCEANS; THEREFORE, IT IS ESSENTIAL FOR UNDERSTANDING GLOBAL CLIMATE TO HAVE ACCURATE MEASUREMENTS OF RAINFALL OVER LARGE WATER AREAS. A DEVICE WILL BE DEVELOPED TO MEASURE RAINFALL ACCURATELY BYUSING UNDERWATER ACOUSTIC SIGNALS. THE BASIC PRINCIPLE OF THIS DEVICE IS DIGITAL PROCESSING OF THE UNDERWATER ACOUSTICSIGNAL GENERATED BY RAINFALL TO DETERMINE ITS INTENSITY. THE PRINCIPLE HAS BEEN DERIVED THEORETICALLY AND DEMONSTRATED EXPERIMENTALLY. HOWEVER, THERE ARE IMPORTANT LIMITATIONS IN THE METHOD USED, AND IT IS PLANNED IN THIS PROJECT TO ESTABLISH MORE SOPHISTICATED SIGNAL-PROCESSING TECHNIQUES TO OVERCOME THESE LIMITATIONS. SPECIFICALLY, OUR GOAL IS TO IMPROVE SIGNIFICANTLY THE ACCURACY OF THE MEASUREMENTS: WHEREAS THE ACTUAL STATE OF THE ART YIELDS RAINFALL RATE ESTIMATES WITHIN A FACTOR OF 2 OF THE ACTUAL VALUE, THE GOAL OF PHASE I IS TO SHOW THE FEASIBILITY OF SIGNAL PROCESSING TECHNIQUES THAT WILL YIELD ESTIMATES WITH MEASUREMENT ERRORS NO GREATER THAN 20%. THE FEASIBILITY STUDY WILL INCLUDE THEORETICAL AND EXPERIMENTAL WORK. PHASE II WILL INCLUDE THE DEVELOPMENT OF A PROTOTYPE DEVICE AND ITS TESTING UNDER ACTUAL CONDITIONS, AND PHASE III WILL BE DEVOTED TO THE DEVELOPMENT OF A COMMERCIAL DEVICE THAT WILL ALLOW FOR EASY MEASUREMENTS OF RAINFALL OVER LARGE BODIES OF WATER.

* information listed above is at the time of submission.

Agency Micro-sites

US Flag An Official Website of the United States Government