摘要:
A method for substituting at least one high quality position measurement of an object taken before an interrupting event with a set of upgraded low quality position measurements of the object provided by the same source of measurements after the interrupting event. The method comprises the following steps: (A) obtaining at least one high quality position measurement of the object provided by a source of measurements before the interrupting event; (B) saving at least one high quality position measurement of the object; (C) if at least one position measurement of the object provided by source of measurements after the interrupting event is of substantially high quality, using at least one position measurement of substantially high quality of the object for navigation purposes of the object; and (D) if each position measurement of the object provided by the source of measurements after the interrupting event is of low quality, and if there is not at least one restoration event; then upgrading at least one position measurement of the object by using an upgrade algorithm.
摘要:
A method for monitoring of the substitution at least one high quality position measurement with a set of upgraded low quality position measurements comprising the steps of: (A) selecting a high quality source of position measurements of the object from a group of high quality sources; (B) obtaining at least one high quality position measurement of the object by using the high quality source; (C) saving at least one high quality position measurement of the object; (D) obtaining at least one low quality position measurement of the object by using a low quality source; (E) substantially continuously monitoring and checking if the currently available high quality position measurement of the object is of substantially high quality; (F) if at least one currently available high quality position measurement of the object is of substantially high quality, using at least one high quality position measurement of the object for navigation purposes of the object; (G) if the currently available high quality position measurement of the object is not of substantially high quality, and if each low quality position measurement of the object is not of substantially high quality, upgrading at least one low quality position measurement of the object by using at least one previously saved high quality position measurement of the object to obtain at least one upgraded low quality position measurement of the object; (H) using at least one upgraded low quality position measurement of the object in place of at least one high quality position measurement of the object for navigation purposes, if each upgraded low quality position measurement of the object is of substantially high quality; and (I) repeating the steps (A–H).
摘要:
In a position determining system that includes a position determining component such as a GPS receiver, and a controller, the system is made geographically dependent by providing a memory with geographic information to which position information from the position determining component is compared to determine whether the system is being used outside the permissible geographic region.
摘要:
A method for substituting at least one high quality position measurement with a set of upgraded low quality position measurements comprising the steps of: selecting a high quality source of position measurements of an object; obtaining at least one high quality position measurement of the object by using the high quality source; wherein each high quality position measurement of the object satisfies the threshold of acceptability requirement for the object; saving at least one high quality position measurement of the object taken at at least one high quality epoch timing coordinate; selecting a low quality source of position measurements of the object; obtaining at least one low quality position measurement of the object using the low quality source; if at least one high quality position measurement of the object is available and substantially recent, using at least one high quality position measurement of the object for navigation purposes of the object; if each high quality position measurement of the object is unavailable, or is available but is not substantially recent, upgrading at least one low quality position measurement of the object by using at least one high quality position measurement of the object to obtain at least one upgraded low quality position measurement that satisfies the threshold of acceptability requirement for the object; and using at least one upgraded low quality position measurement of the object that satisfies the threshold of acceptability requirement for the object in place of at least one high quality position measurement for navigation purposes of the object.