JOSEPH MICHAEL WLAD
Pilots at Kofman Ct, Alameda, CA
License number
California A2490364
Issued Date
Jun 2015
Expiration Date
Jun 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
17 Kofman Ct, Alameda, CA 94502
Professional information
Adaptive Threshold Logic Implementation For Raim Fault Detection And Exclusion Function
US Patent:
6798377, Sep 28, 2004
Filed:
May 31, 2003
Appl. No.:
10/449340
Inventors:
Lawrence O. Lupash - Sunnyvale CA
Joseph Wlad - Alameda CA
Joseph Wlad - Alameda CA
Assignee:
Trimble Navigation, Ltd. - Sunnyvale CA
International Classification:
H04B 7185
US Classification:
34235702, 34235713
Abstract:
A method for improving a satellite receiver autonomous integrity monitoring (RAIM) availability and fault detection and exclusion (FDE) function by using an adaptive threshold logic. The method comprises the following steps: (A) pre-computing a database of thresholds; (B) selecting in real time from the database a plurality of thresholds corresponding to a set of available measurements; and (C) determining an optimum RAIM/FDE function corresponding to the set of available measurements by using the adaptive threshold logic that utilizes the plurality of thresholds corresponding to the set of available measurements. The set of available measurements is selected from the group consisting of: {a GPS measurement, a GLONASS measurement, a GALILEO measurement, a baro measurement, a clock measurement, and a pseudolite measurement}.
Method For Navigation Of Moving Platform By Using Satellite Data Supplemented By Satellite-Calibrated Baro Data
US Patent:
6205377, Mar 20, 2001
Filed:
Apr 27, 1999
Appl. No.:
9/300934
Inventors:
Lawrence O. Lupash - Sunnyvale CA
Joseph M. Wlad - Alameda CA
Joseph M. Wlad - Alameda CA
Assignee:
Trimble Navigation LTD - Sunnyvale CA
International Classification:
H04B 7185, G06F 700
US Classification:
701 13
Abstract:
The method of supplementing the satellite data by the satellite-calibrated baro data when the receiver autonomous integrity monitoring function (RAIM) is unavailable and when the horizontal protection level (HPL) does not satisfy the horizontal alert limit (HAL) requirement is disclosed. The baro data is calibrated with satellite data if maximum weighted vertical dilution of precision with one satellite removed at one time (max {SubWVDOP}) is less than a predetermined threshold (TSUB) and if a test statistic is less than a predetermined test statistic threshold (TST). The HPL is re-computed using the satellite-calibrated baro data. The re-computed HPL could satisfy the HAL requirement which would make the RAIM function available when it would be otherwise unavailable.
Horizontal/Vertical Protection Level Adjustment Scheme For Raim With Baro Measurements
US Patent:
6281836, Aug 28, 2001
Filed:
May 21, 1999
Appl. No.:
9/337371
Inventors:
Lawrence O. Lupash - Sunnyvale CA
Joseph M. Wlad - Alameda CA
Joseph M. Wlad - Alameda CA
Assignee:
Trimble Navigation LTD - Sunnyvale CA
International Classification:
H04B 7185
US Classification:
34235702
Abstract:
The method of supplementing the satellite data by the satellite-calibrated baro data when the receiver autonomous integrity monitoring function (RAIM) is unavailable and when the horizontal protection level (HPL) does not satisfy the horizontal alert limit (HAL) requirement is disclosed. The baro data is adjusted to compensate for the lack of baro calibration in the position solution domain. The HPL is re-computed using the satellite-calibrated adjusted baro data. The re-computed HPL could satisfy the HAL requirement which would make the RAIM function available when it would be otherwise unavailable.