Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate
1999-06-08
2001-05-01
McElheny, Jr., Donald E. (Department: 2862)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
Reexamination Certificate
active
06226594
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electronic tide meter for calculating a spring tide day and displaying the calculated result, a spring tide day calculating method, and a recording medium which can be read by a computer recorded execute the method.
2. Description of the prior Art
The tides or the rising and falling of the sea level are of particular importance to fishermen. Above all, the spring tide day is the most important.
It is generally achieved by calculating the age or phase of the moon to acquire the tidal phenomena, especially the spring tide day. The calculated result of the moon age is available as the tidal information by the public agencies so that the spring tide day can be acquired by perusing the tidal information.
For those who always require the Information of the tidal phenomena, however, the perusal of the information is inefficient, and all the opened information on the tidal phenomena is not always required. Thus, there has been desired means for knowing the information of the desired tidal phenomena, especially the spring tide day.
Therefore, there has been proposed an electronic tide meter for displaying the calculated result of the spring tide day by deducing the moon age from a desired data (as will be called the “designated date”) and by calculating the spring tide day to appear at first from the designated date, by using the deduced moon age.
According to the electronic tide meter disclosed in JP-B-6-25982, for example, the spring tide day is determined by calculating the moon age on the designated date at first and by calculating the number of days till the next spring tide appears, from the moon age while considering the period of the moon age.
Generally, the spring tide and the neap tide are individually defined as the states of tide at the full moon or the new moon and as the states of tide at the first and last quarters of the moon. However, the day deemed important for those in the fishing industry, is the day on which the tide level difference is at its maximum between the high and low tides in each particular geographical area. The spring tide day does not always coincide in this sense with the aforementioned one which is calculated depending exclusively on the moon age. This is because the tide level difference between the high and low tides is different depending on the geographical area, so that the spring tide day depending upon the area cannot be calculated exclusively from the moon age deduced from the calculation of the positions of the heavenly bodies.
In the electronic tide meter disclosed in JP-B-6-25982, the calculation is made by using only the moon age at the designated date. Even when the day actually having the maximum tide level difference is two days after the data calculated for a particular geographical area, there may occur such a large error that the actual spring tide day comes five days after the designated calculated date.
The invention has been conceived in view of those disadvantages belonging to the prior art and has an object to provide an electronic tide meter and a spring tide day calculating method for calculating a spring tide day corresponding to an area more accurately, and a recording medium which can be read by a computer stored with a program for causing the computer to execute the inventive calculating method.
SUMMARY OF THE INVENTION
In order to achieve the object by solving the aforementioned problems, according to a first construction of the invention, there is provided an electronic tide meter for calculating a spring tide day from a designated calendar, which meter comprises: input means for inputting the calendar and selecting a geographical area; storage means for storing the tidal data of each area; and operation means for calculating the positions of the heavenly bodies from the calendar and reading the tidal data, as determined by the selection of the area, from the storage means to calculate the spring tide day from the calculated result of the positions of the heavenly bodies and the tidal data.
According to this construction, there is provided the operation means for calculating the spring tide day by using not only the moon age value such as the positional information of the heavenly bodies, as determined from the designated calendar, but also the tidal data which is dependent on a selected geopraphic area and stored in area the storage means. Thus, the spring tide day for the selected grographical area can be accurately determined.
According to a second construction of the invention, on the other hand, there is provided an electronic tide meter for calculating a spring tide day from a designated calendar. The tide meter comprises: input means for inputting the calendar and selecting a geographic area area; storage means for storing the tidal data of each area; new moon day and full moon day calculating means for determining a new moon day and a full moon day by calculating the positions of the heavenly bodies from the calendar; and spring tide day operation means for reading the tidal data, as determined by the selection of the area, from the storage means to calculate the to spring tide day by adding the tidal data individually to the new moon day and the full moon day the spring tide day is calculated.
According to this construction, there is provided the spring tide day operating means for calculating the true spring tide day, by determining the moon age value such as the positional information of the heavenly bodies from the designated calendar. The tidal data of each area, tidal phenomena, from the storage means provided, and by adding the tidal data to the new moon day and the full moon day, as determined from the moon age value, to determine a tentative spring tide day.
According to a third construction of the invention, on the other hand, there is provided a spring tide day calculating method for calculating a spring tide day from a designated calendar. The inventive method comprises: a first step of storing tidal data of each area; a second step of inputting the calendar and selecting the area; a third step of calculating the positions of the heavenly bodies from the calendar; and a fourth step of calculating the spring tide day from the calculated results of the positions of the heavenly bodies and the tidal data corresponding to the selected area.
According to this construction, the spring tide day is calculated by using not only the moon age value such as the positional information of the heavenly bodies, as determined from the designated calendar, but also the tidal data which are difference for each geographic area and stored in the storage means. Thus, the spring tide day of different geographic areas can be accurately determined.
According to a fourth construction of the invention, on the other hand, there is provided a spring tide day calculating method for calculating a spring tide day from a designated calendar. The inventive method comprises: a first step of storing tidal data of each geographic area; a second step of inputting the calendar and selecting the area; a third step of calculating the positions of the heavenly bodies from the calendar to determine the new moon day and the fully moon day from the calculated results of the positions of the heavenly bodies; and a fourth step of calculating the day, as appearing at first on and after the calendar, of those determined by adding the tidal data, as determined by the selection of the area, individually to the new moon day and the full moon day, as the spring tide day.
According to this construction of the invention, on the other hand, the true spring tide day is calculated by determining the moon age value such as the positional information of the heavenly bodies from the designated calendar, by reading the tidal data of each area, as causing the tidal phenomena, and by adding the tidal data to the new moon day and the full moon day, as determined from the moon age value, to determine a tentative spring tide day, when this tentative spring tide day is the fir
Adams & Wilks
McElheny Jr. Donald E.
Seiko Instruments Inc.
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