Form filling instructions

Interaction between user and the program installed in the server to reconstruct and visualize Sea Level and Currents for a given time interval depends on the proper filling of the request form where ruling parameters are set. Therefore, care must be exerted in order to provide all of the valid parameters –into their proper ranges- necessaries to start the computation of sea level and currents without errors and finish the process in the minimum time possible.

In order to reduce input error from the user, we must be familiar with the meaning of the form page parameters to introduce, and valid rules between them. For input parameters out of rules the submit button is disabeled and the user can't continue until adjust and select right parameters .

Next we deal with some util definitions previous to write the rules (pointed as 'Rules' at the end of this page)..

 

Definitions

The meanings of the arguments you must provide are:

Initial Date: Is the Day, Month and Year of the first data to be computed. Initial Hour is by default the 00:00 in GMT.  

Final Date: Is the Day, Month and Year of the last data to be computed. Default value is 23:00 GMT .

Harmonics Selection: Where user must chose the tidal constituents wanted to be included in the calculation. Available options are grouped in function of their frequency band values. The constituents included in the different options are:

Semidiurnal                 M2, S2, N2 and K2

Diurnal                                  O1, P1 and K1

Semidiurnal and Diurnal  Both of the above options

Seasonal                              Mm, Msm, Semiannual and Annual

All                                          All of the above constituents plus N2S2, Mf, Msf


Data Type: Here the user selects the variable to be computed, the sampling rate, the region in the gulf where the variable is computed, and, for some cases, the output of the results. These options are explained next.

Variable: Is the type of data variable desired to obtain between Sea Level (Heights referred to the Mean Sea Level or level 0 only), Currents in predetermined levels (see below), or Both.

Sampling rate: Is the time interval between samples. Options are:

12 mi    Time Interval of 12 minutes

20 mi    Time Interval of 20 minutes

30 mi     Time Interval of 30 minutes

  1 hr     Time Interval of 1 hour

  2 hr     Time Interval of 2 hours

  1 dy     Time Interval of 24 hours

 1 wk     Time Interval of 168 hours or 7 days

15 dy Time Interval of 15 days

1 mn      Time Interval of 30 days

 

Level (m). Is the nominal depth of the mean currents between the upper and lower interface of each model layer. The options are:

       5 m            Between the surface elevation and 10 m

     15 m            Between 10 and 20  m depth

     25 m            Between 20 and 30 m depth

     45 m            Between 30 and 60 m depth

     80 m            Between 60 and 100 m depth

   125 m            Between 100 and 150 m depth

   175 m            Between 150 and 200 m depth

   225 m            Between 200 and 250 m depth

   300 m            Between 250 and 350 m depth

   475 m            Between 350 and 600 m depth

   800 m            Between 600 and 1000 m depth

 2000 m            Between 1000 m depth and the bottom

 

Region. The area or point from where user wants to get data. You may select from following options:

 A Point in the Map. A point on the sensible map is chosen with the mouse

 Northern Gulf. Animations will be made for the northern part of the Gulf

Central Gulf. Animations will be made for the central part of the Gulf

Southern Gulf. Animations will be made for the southern part of the Gulf

 Full Gulf. Animations will be made for the whole Gulf

 

 

Output. Is the output you request to visualize the data. Options are for:

A Point in the Map: Data as text or Graphic as an image in format 'jpg'

Northern, Central, Southern or Full Gulf:  an animation in format 'mpg' and the last image of the animation in format 'jpg'.

 

Rules

  1. Initial and final date must be provided in chronological order.

 

  1. Due to memory limitations and to improve the speed of data transference, depending on the value assigned to ‘Data Type’ the number of samples is limited to:

8784 if 'A Point in the Map' is chosen (e.g., with a sampling rate of 1 hour you obtain 8784 hr which is ~ 1 year, a sampling rate of 15 min you obtain 8784/4 hrs = 2196 hr ~ 3 months)

72 frames if ‘Region’ is chosen and for one variable (e.g., 20 min sampling you obtain 72/3 hrs = 1 day)

24 if ‘Region’ is chosen with 'Both' variables.