Reception apparatus and reception method

A non-transitory computer-readable medium having stored thereon, computer-executable instructions, which when executed by a processor of a first reception apparatus, cause the processor to execute operations, the operations comprising:

• acquiring, from a plurality of reception apparatuses via proximity wireless communication, a plurality of pieces of altitude information calculated in the plurality of reception apparatuses, wherein
• the plurality of reception apparatuses excludes the first reception apparatus, and
• each of the plurality of pieces of altitude information indicates an altitude of a corresponding reception apparatus of the plurality of reception apparatuses;
• acquiring a plurality of pieces of altitude reliability information from the plurality of reception apparatuses via the proximity wireless communication,
• wherein each of the plurality of pieces of altitude reliability information indicates a reliability of the altitude of the corresponding reception apparatus of the plurality of reception apparatuses;
• selecting, based on the plurality of pieces of altitude reliability information, a second reception apparatus of the plurality of reception apparatuses having a highest reliability of the altitude among the plurality of reception apparatuses;
• computing, in a case where four or more global navigation satellite system (GNSS) signals have been received, positioning based on the GNSS signals;
• and
• computing, in a case where three or less of the GNSS signals have been received, the positioning based on the GNSS signals and a piece of altitude information of the plurality of pieces of altitude information of the selected second reception apparatus.

A reception method, comprising:

• acquiring, by an altitude information acquisition unit of a first reception apparatus, a plurality of pieces of altitude information from a plurality of reception apparatuses via proximity wireless communication, wherein
• the plurality of reception apparatuses excludes the first reception apparatus, and
• each of the plurality of pieces of altitude information indicates an altitude of a corresponding reception apparatus of the plurality of reception apparatuses;
• acquiring, by the altitude information acquisition unit, a plurality of pieces of altitude reliability information from the plurality of reception apparatuses via the proximity wireless communication,
• wherein each of the plurality of pieces of altitude reliability information indicates a reliability of the altitude of the corresponding reception apparatus of the plurality of reception apparatuses;
• selecting, by the altitude information acquisition unit, based on the plurality of pieces of altitude reliability information, a second reception apparatus of the plurality of reception apparatuses having a highest reliability of the altitude among the plurality of reception apparatuses;
• in a case where four or more global navigation satellite system (GNSS) signals have been received, computing, by a positioning calculation unit of the first reception apparatus, positioning based on the GNSS signals;
• and
• in a case where three or less of the GNSS signals have been received, computing, by the positioning calculation unit, the positioning based on the GNSS signals and a piece of altitude information of the plurality of pieces of altitude information of the selected second reception apparatus.