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

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

**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** **M****m, 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

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

- 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.