urtapbt

Incremental manual page of program

urtabt.f

See urtap.html for anything else but - keyword: - band_response

Purpose:

Analysis stage (first run): Analyse the response parameters in the fundamental bands; compute a series of polynomials for each.
Application stage (second run): Apply the response function to tune partial waves in wave-groups

Function:

A Fundamental Band (FB) in the present context comprises tides of degree 2 and orders 0, 1, 2, and tides of degree and order 3.
The complex response parameters in each (selectable) FB are approximated with a complex polynomial.
As a constraint, the first and last response parameters are copied to the FB corners and applied with an upscaled weight
wghtc_band_response

For further investigation, wave group signals can be written to file, e.g. for cross-correlation analysis (*bands_out).

In application, the polynomial is evaluated at the wave-group's pivot frequency, Z_p = P(f_p).
A partial wave in the same wave-group with frequency f is admitted to the wave-group with a factor P(f) / Z_p

Subroutines:

tap/t/p/bandfrsps.f

Files:

File unit iun_band_response , BIN, read/write, to be included in open-file block.

File unit iun_bands_out , BIN MC, write, to be included in open-file block (analysis stage only).

Namelist &param

name	type	description	default
`iun_band_response`	`- integer -`	`A negative number signals that the file and its content are ignored in wave-group construction.This is the case in the analysis stage.`	`-76`
`q_band_response`	`- logical -`	`Do application and/or analysis stageIf .true. and iun_band_response > 0, do application.`	`.false.`
`opt``_band_response`	`- char*8 -`	`'S' - skip writing'R' - re-write iun_band_response'N' - write to iun_band_response+1'A' - append iun_band_response`	`'A'`
`nords_band_response(2,0:3)`	`- integer -`	`Polynomial order bracket for FB = 0,1,2,3 (1,FB) ≤ order ≤ (2,FB)`	`8*-1`
`qdbg_band_response`	`- logical -`	`General debug option`	`.false.`
`qshow_band_response`	`- logical -`	`Show response tuning in application stage`	`.false.`
`wghtc_band_response`	`- real*8 -`	`Relative inverse weight at the band corner (a large value down-weights)`	`1.0d0`
`nbands_out(200)`	`- integer -`	`Write these signal bands to BIN mc-file`	`200*-1`
`iun_bands_out`	`- integer -`	`File unit number (skip if <= 0)`	`-1`
`label_bands_out`	`- char*16 -`	`(use only 10 chars!) just an arbitrary string, first part of label`	`'URTAPBT'`

Still missing:
Tool to show/plot the polynomials
Extension of analysis stage to work with a set of corner weights
Read specific polynomials using location tags

.bye