Abstract: The methods and devices provide for calibration of two or three-axis magnetic field sensors with an artificial magnetic calibration field, or a sequence of magnetic calibration fields, that overwhelm the earth's magnetic field and any other extraneous magnetic fields that may be present in the calibration area. The calibration field or fields are produced with a known relationship to a test stand or jig on which a two and or three-axis magnetic field sensor is secured. The calibration fields are oriented to produce fields that have generally parallel lines of force (relative to the sensor to be calibrated) with minimal curvature or discontinuity. For each coil or calibration field, data from each sensor may be collected and analyzed to enable one or more correction factors to be determined for each sensor. The correction factors may be provided to the apparatus in which the magnetic sensor is secured to correct sensor data and provide more accuracy.

Abstract: The methods and devices provide for calibration of two or three-axis magnetic field sensors with an artificial magnetic calibration field, or a sequence of magnetic calibration fields, that overwhelm the earth's magnetic field and any other extraneous magnetic fields that may be present in the calibration area. The calibration field or fields are produced with a known relationship to the test stand or jig on which a two and or three-axis magnetic field sensor is secured. The calibration fields are oriented to produce fields that have generally parallel lines of force (relative to the sensor to be calibrated) with minimal curvature or discontinuity. For each coil or calibration field, data from each sensor may be collected and analyzed to enable one or more correction factors to be determined for each sensor. The correction factors may be provided to the apparatus in which the magnetic sensor is secured to correct sensor data and provide more accuracy.

Abstract: A hand-held electronic celestial object-locating device assists in identifying a celestial object or directing a user to a desired celestial object. The device is useful for locating or identifying any celestial object including stars, constellations, planets, comets, asteroids, artificial satellites, and deep sky objects to name a few. The device utilizes sensors for 3-axis magnetic field and 3-axis gravitational field detection. The device utilizes a processor and an electronic database to perform the required calculations. The device's database may be updated through access to the Internet through which the updates may be purchased.

Abstract: Celestial object location devices with sensor arrays of having less that one sensor for each of three orthogonal components of gravity and magnetic field vectors. The accuracy of position sensing is enhanced by estimating “missing” sensor input based on input from two orthogonal sensors provided, or determined with limitations from the two gravitational sensors provided.

Abstract: Celestial object location devices with sensor arrays of having less that one sensor for each of three orthogonal components of gravity and magnetic field vectors. The accuracy of position sensing is enhanced by estimating “missing” sensor input based on input from two orthogonal sensors provided, or determined with limitations from the two gravitational sensors provided.

Abstract: A celestial object location and identification device.

Abstract: A hand-held electronic celestial object-locating device assists in identifying a celestial object or directing a user to a desired celestial object. The device is useful for locating or identifying any celestial object including stars, constellations, planets, comets, asteroids, artificial satellites, and deep sky objects to name a few. The device utilizes sensors for 3-axis magnetic field and 3-axis gravitational field detection. The device utilizes a processor and an electronic database to perform the required calculations. The device's database may be updated through access to the Internet through which the updates may be purchased.

Abstract: A hand-held electronic celestial object-locating device assists in identifying a celestial object or directing a user to a desired celestial object. The device is useful for locating or identifying any celestial object including stars, constellations, planets, comets, asteroids, artificial satellites, and deep sky objects to name a few. The device utilizes sensors for 3-axis magnetic field and 3-axis gravitational field detection. The device utilizes a processor and an electronic database to perform the required calculations. The device's database may be updated through access to the Internet through which the updates may be purchased.

Abstract: A hand-held electronic celestial object-locating device assists in identifying a celestial object or directing a user to a desired celestial object. The device is useful for locating or identifying any celestial object including stars, constellations, planets, comets, asteroids, artificial satellites, and deep sky objects to name a few. The device utilizes sensors for 3-axis magnetic field and 3-axis gravitational field detection. The device utilizes a processor and an electronic database to perform the required calculations. The device's database may be updated through access to the Internet through which the updates may be purchased.

Abstract: A hand-held electronic celestial object locating device assists in identifying a celestial object or directing a user to a desired celestial object. The device is useful for locating or identifying any celestial object including stars, constellations, planets, comets, asteroids, artificial satellites, and deep sky objects to name a few. The device utilizes sensors for 3-axis magnetic field and 3-axis gravitational field detection. The device utilizes a processor and an electronic database to perform the required calculations. The device's database may be updated through access to the Internet through which the updates may be purchased.