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Class Information
Number: 342/120
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Determining distance > Altimeter
Description: Subject matter including determining the distance an aircraft to the earth"s surface from the aircraft.

Sub-classes under this class:

Class Number Class Name Patents
342/122 Fm type 67
342/121 With additional indicator 35

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8629799 Surface penetrating radar system and target zone investigation methodology Jan. 14, 2014
8604970 Systems and methods for generating data in a digital radio altimeter and detecting transient radio altitude information Dec. 10, 2013
8558731 System for and method of sequential lobing using less than full aperture antenna techniques Oct. 15, 2013
8432308 Method and device for monitoring radioaltimetric heights of an aircraft Apr. 30, 2013
8427360 Apparatus and method for assisting vertical takeoff vehicles Apr. 23, 2013
8410975 Systems and methods for generating and verifying altitude data Apr. 2, 2013
8354951 Short baseline helicopter positioning radar for low visibility Jan. 15, 2013
8332137 Navigation system with dynamically calibrated pressure sensor Dec. 11, 2012
8321074 Altitude data generation system, device, and method Nov. 27, 2012
8275495 Method and device for monitoring the ability to navigate of an aircraft during a phase of flight close to the ground Sep. 25, 2012
8259002 Radar altimeter antenna performance monitoring via reflected power measurements Sep. 4, 2012
8248298 Orthogonal linear transmit receive array radar Aug. 21, 2012
8244424 Database comprising topographical information on obstacles and method for generating one such database Aug. 14, 2012
8193968 Systems and methods for space situational awareness and space weather Jun. 5, 2012
8153943 Tornado detection network Apr. 10, 2012
8077078 System and method for aircraft altitude measurement using radar and known runway position Dec. 13, 2011
8059025 Altimetry method and system Nov. 15, 2011
8044842 High accuracy radar altimeter using automatic calibration Oct. 25, 2011
7911375 Doppler beam-sharpened radar altimeter Mar. 22, 2011
7843380 Half aperture antenna resolution system and method Nov. 30, 2010
7839322 System for detecting obstacles in the vicinity of a touchdown point Nov. 23, 2010
7839321 Radar cable detection system Nov. 23, 2010
7825851 History or image based methods for altitude determination in a radar altimeter Nov. 2, 2010
7821446 Unswitched, ultra low power, long range radar system Oct. 26, 2010
7818115 Procedure for determining a navigation solution of a navigation system with a Terrain Navigation Module, as well as a navigation system Oct. 19, 2010
7808423 Methods for rapid target acquisitions in range measurement systems Oct. 5, 2010
7808425 Space-borne altimetry apparatus, antenna subsystem for such an apparatus and methods for calibrating the same Oct. 5, 2010
7791529 System for estimating the speed of an aircraft, and an application thereof to detecting obstacles Sep. 7, 2010
7777668 Radar altimeter with forward looking radar and data transfer capabilities Aug. 17, 2010
7761197 Method and device for detecting air turbulence in the environment of an aircraft Jul. 20, 2010
7701384 Antenna system for a micro air vehicle Apr. 20, 2010
7688253 Method and processor for reduced ambiguity resolution matrix for interferometric angle determination Mar. 30, 2010
7675461 System and method for displaying radar-estimated terrain Mar. 9, 2010
7652615 Methods and systems providing an adaptive threshold for a beam sharpened pulse radar Jan. 26, 2010
7646333 Pseudo-random pulse interval generation in navigation-aiding devices Jan. 12, 2010
7633430 Terrain awareness system with false alert suppression Dec. 15, 2009
7616150 Null steering system and method for terrain estimation Nov. 10, 2009
7576683 Methods and systems for reducing interference caused by antenna leakage signals Aug. 18, 2009
7576684 Integrated attitude altimeter Aug. 18, 2009
7518547 Method and system of interference detection for radar altimeters Apr. 14, 2009
7486227 System and method for removal of sea-state bias in satellite altimetry data Feb. 3, 2009
7486228 Methods and systems for piecewise curve fitting or radar altimeter range gate data Feb. 3, 2009
7463187 Method and system of improving altimeter accuracy by use of a separate peak return signal tracking Dec. 9, 2008
7446697 Method and system for calibrating radar altimeters Nov. 4, 2008
7429948 Device and method for calibrating and improving the accuracy of barometric altimeters with GPS-derived altitudes Sep. 30, 2008
7379015 First responder positioning apparatus May. 27, 2008
7330147 System and method for ground proximity warning with enhanced obstacle depiction Feb. 12, 2008
7304601 Device and a method for accurate radar level gauging Dec. 4, 2007
7295150 Methods and systems for identifying high-quality phase angle measurements in an interferometric radar system Nov. 13, 2007
7268723 System and method for locating targets using measurements from a space based radar Sep. 11, 2007

1 2 3 4

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