decodeHeader: Decode a Nortek header

Description

Decode data in a Nortek ADV or ADP header.

Usage

decodeHeaderNortek(buf,
                  type=c("aquadoppHR", "aquadoppProfiler", "aquadopp", "vector"),
                  debug=getOption("oceDebug"), ...)

Arguments

buf

a ``raw'' buffer containing the header

type

type of device

debug

a flag that turns on debugging. Set to 1 to get a moderate amount of debugging information, or to 2 to get more.

...

additional arguments, passed to called routines.

Value

A list containing elements hardware, head, user and offset. The easiest way to find the contents of these is to run this function with debug=3.

Details

Decodes the header in a binary-format Nortek ADV/ADP file. This function is designed to be used by read.adp and read.adv, but can be used directly as well. The code is based on information in the Nortek System Integrator Guide (2008) and on postings on the Nortek ``knowledge center'' discussion board. One might assume that the latter is less authorative than the former. For example, the inference of cell size follows advice found at http://www.nortekusa.com/en/knowledge-center/forum/hr-profilers/736804717 (downloaded June 2012)), which contains a typo in an early posting that is corrected later on.

References

1. Information on Nortek profilers (including the System Integrator Guide, which explains the data format byte-by-byte) is available at http://www.nortekusa.com/. (One must join the site to see the manuals.)