Tidal Table on August 30th, 20 19

Speaking of the Internet, many of us know that some friends ask the name of the baby born on August 30th, 20 19, and of course some people ask the exchange rate of US dollars on June 30th, 20 19. What happened? In fact, the low tide time in Qinhuangdao is 2065438+August 8, 2009. The following is an online query of the tide table of 2065438+2009 carefully compiled by Bian Xiao, hoping to help you.

20 19 tide table online query

The tidal table of Tanggu on August 28th, 20 19 is as follows:

1, 0: 357, 1: 336, 2: 30 1, 3: 255, 4: 204, 5: 00: 157, 6: 00: 123, 7: 00: 1 165448. 1 1, 12, 357, 13, 389, 14, 367, 15, 333, 16.

2. Tide table is the abbreviation of tide forecast table, which forecasts the daily tide situation in some coastal areas in a certain period in the future.

3. Tide tables generally include daily forecast tables of major ports (usually including the time and height of high tide and low tide, and hourly tide level in some ports), port gradient ratio, tide information and calculation of tide level at any time.

Daily forecast table of major ports

Tidal phenomena can be regarded as the superposition of tidal components in many different periods, so the tidal height at any moment can be expressed as the height of average sea level on the tidal height datum, the circumferential frequency of tidal components and the intersection factor, where d is the astronomical phase angle at the beginning of Greenwich, and h is the harmonic constant-amplitude and lag angle of tidal components. In this way, the tidal harmonic constant of the port can be calculated, and the tidal time and height of high tide and low tide and the tidal height of every hour can be calculated, and the daily forecast table can be made.

Port difference ratio

The difference includes tidal time difference, tidal range ratio and tidal height ratio, which is obtained from the tidal data of the main port and the auxiliary port, and can also be calculated from the tidal harmonic constants of the main port and the auxiliary port. Contrast method is a method to predict the tide of subsidiary ports by using the tide forecast of main ports. If you want to find the time of high tide and low tide in an affiliated port, you only need to add the time of high tide or low tide in the main port to the tidal time difference in the affiliated port. In order to obtain the high tide level of high tide and low tide in the harbor, tidal range ratio or tidal height ratio can be used to calculate.

Calculation of arbitrary tidal time or tidal height

In tide tables, charts and tables are usually attached to facilitate calculation. These charts and tables are used to calculate the tide level at any time between high tide and low tide or at any time when any tide level appears when high tide and low tide are known. In addition, some tide tables are accompanied by the harmonic constants of the main tidal components of each port, or briefly introduce the tidal current in the nearby waters.