Navigation apparatus and navigation-related information display method

1. A navigation apparatus, comprising:

an acquisition unit that acquires a plurality of orbit data by demodulating each of the orbit data of a plurality of satellites received from the satellites;

a current position locating unit that computationally determines a plurality of distance data from the plurality of satellites according to arrival times of, or times of acquiring the respective plurality of orbit data or some other data by the acquisition unit, and pinpoints the current position of its own according to the plurality of orbit data or the plurality of distance data;

an acquisition progress level display unit that monitors an acquisition progress level until completely acquiring the plurality of orbit data sufficient for pinpointing the position and displays a current data acquisition ratio relative to the plurality of orbit data sufficient for pinpointing the position in a display section using a level mark of a predetermined bar display; and

a remaining effective time display unit that counts the remaining effective time of the orbit data used for pinpointing the current geographical position and displays the remaining effective time in the display section in a predetermined display format, wherein

the remaining effective time display unit displays the bar display of the level mark, providing it with a gradation of a color that fades as a function of the decrease of the remaining effective time.

2. The apparatus according to claim 1 , wherein

the remaining effective time display unit starts providing the bar display of the level mark with a gradation when the remaining effective time falls below a predetermined time.

3. The apparatus according to claim 1 , wherein

the remaining effective time display unit displays the remaining effective time, providing it with a gradation, and at the same time displays a text telling the remaining effective time.

4. A navigation apparatus, comprising:

an acquisition unit that acquires a plurality of orbit data by demodulating each of the orbit data of a plurality of satellites received from the satellites;

a current position locating unit that computationally determines a plurality of distance data from the plurality of satellites according to arrival times of, or times of acquiring the respective plurality of orbit data or some other data by the acquisition unit, and pinpoints the current position of its own according to the plurality of orbit data or the plurality of distance data;

an acquisition progress level display unit that monitors an acquisition progress level until completely acquiring the plurality of orbit data sufficient for pinpointing the position and displays a current data acquisition ratio relative to the plurality of orbit data sufficient for pinpointing the position in a display section using a level mark of a predetermined bar display; and

a remaining effective time display unit that counts the remaining effective time of the orbit data used for pinpointing the current geographical position and displays the remaining effective time in the display section in a predetermined display format, wherein

the remaining effective time display unit displays a predetermined bar display showing the extent by which the remaining effective time is decreased apart from the level mark.

5. A navigation apparatus, comprising:

an acquisition unit that acquires a plurality of orbit data by demodulating each of the orbit data of a plurality of satellites received from the satellites;

a current position locating unit that computationally determines a plurality of distance data from the plurality of satellites according to arrival times of, or times of acquiring the respective plurality of orbit data or some other data by the acquisition unit, and pinpoints the current position of its own according to the plurality of orbit data or the plurality of distance data;

an acquisition progress level display unit that monitors an acquisition progress level until completely acquiring the plurality of orbit data sufficient for pinpointing the position and displays a current data acquisition ratio relative to the plurality of orbit data sufficient for pinpointing the position in a display section using a level mark of a predetermined bar display; and

a remaining effective time display unit that counts the remaining effective time of the orbit data used for pinpointing the current geographical position and displays the remaining effective time in the display section in a predetermined display format, wherein

the remaining effective time display unit displays a predetermined circle graph showing the extent by which the remaining effective time is decreased apart from the level mark.

6. A navigation-related information display method comprising:

an orbit data acquisition step of acquiring a plurality of orbit data by demodulating each of the orbit data of a plurality of satellites received from the satellites;

a current position locating step of computationally determining a plurality of distance data from the plurality of satellites according to arrival times of, or times of acquiring the respective plurality of orbit data or some other data by the orbit data acquisition step, and pinpointing the current position of its own according to the plurality of orbit data or the plurality of distance data;

an acquisition progress level display step of monitoring an acquisition progress level until completely acquiring the plurality of orbit data sufficient for pinpointing the position and displaying a current data acquisition ratio relative to the plurality of orbit data sufficient for pinpointing the position in a display section by means of a level mark of a predetermined bar display; and

a remaining effective time display step of counting the remaining effective time of the orbit data used for pinpointing the current geographical position and displaying the remaining effective time in the display section in a predetermined display format, wherein

the remaining effective time display step displays the bar display of the level mark, providing it with a gradation of a color that fades as a function of the decrease of the remaining effective time.

7. The method according to claim 6 , wherein

the remaining effective time display step starts providing the bar display of the level mark with a gradation when the remaining effective time falls below a predetermined time.

8. The method according to claim 6 , wherein

the remaining effective time display step displays the remaining effective time, providing it with a gradation, and at the same time displays a text telling the remaining effective time.

9. A navigation-related information display method comprising:

an orbit data acquisition step of acquiring a plurality of orbit data by demodulating each of the orbit data of a plurality of satellites received from the satellites;

a current position locating step of computationally determining a plurality of distance data from the plurality of satellites according to arrival times of, or times of acquiring the respective plurality of orbit data or some other data by the orbit data acquisition step, and pinpointing the current position of its own according to the plurality of orbit data or the plurality of distance data;

an acquisition progress level display step of monitoring an acquisition progress level until completely acquiring the plurality of orbit data sufficient for pinpointing the position and displaying a current data acquisition ratio relative to the plurality of orbit data sufficient for pinpointing the position in a display section by means of a level mark of a predetermined bar display; and

a remaining effective time display step of counting the remaining effective time of the orbit data used for pinpointing the current geographical position and displaying the remaining effective time in the display section in a predetermined display format, wherein

the remaining effective time display step displays a predetermined bar display showing the extent by which the remaining effective time is decreased apart from the level mark.

10. A navigation-related information display method comprising:

an orbit data acquisition step of acquiring a plurality of orbit data by demodulating each of the orbit data of a plurality of satellites received from the satellites;

a current position locating step of computationally determining a plurality of distance data from the plurality of satellites according to arrival times of, or times of acquiring the respective plurality of orbit data or some other data by the orbit data acquisition step, and pinpointing the current position of its own according to the plurality of orbit data or the plurality of distance data;

an acquisition progress level display step of monitoring an acquisition progress level until completely acquiring the plurality of orbit data sufficient for pinpointing the position and displaying a current data acquisition ratio relative to the plurality of orbit data sufficient for pinpointing the position in a display section by means of a level mark of a predetermined bar display; and

a remaining effective time display step of counting the remaining effective time of the orbit data used for pinpointing the current geographical position and displaying the remaining effective time in the display section in a predetermined display format, wherein

the remaining effective time display step displays a predetermined circle graph showing the extent by which the remaining effective time is decreased apart from the level mark.