Argo profile pressure correction

This page is automatically created by code which scans all files in the Argo USGODAE GDAC.

Plots and listings analysing the pressure correction for floats of each DAC are accessed through the Plots Index Tables.


Summary stats of DAC vs Audit pressure correction differences

Pressure Correction [all float types]
AOMLBODCCORIOLISCSIROGTSJMAMEDSCSIOINCOISKMAKORDITotal all DACs
# floats34163121077336373936298621851421197256
New fmt tech335231110753333739262975118414247048
SP offset deduced311829497133109042625117811606225
P=Praw-SP235529497133109042625117811605462
P type unknown234171042373223506264823
P(N)-SP(N+1)229729497133109042625117811605404
N+1 unknown2981810653733236117261191031
Pcor varies in prof92931362433735424078902317
Some Praw-Padj2627306788332373901288441851421196105
Some valid SP2460306724332373889262381851421195830
Some DAC vs Audit test2448305721332373851262381851421195776
Results of DAC vs Audit Pcor comparisons
All agree12012012992060787218946002229
All diffs < 1dbar735692981213734611616624601882
Some diffs > 1dbar512351245072774429361191665
All disagree3710650071349711201191355
Median Min Adjusted Profile Pressure
Med MPP < 2.5dbar2621460023101400212
Med MPP < 7.5dbar23242655283120788216331603804664
Med MPP < 12.514757590706483520433
Med MPP > 12.5301626501101250105

Pressure Correction [apex floats only]
AOMLBODCCORIOLISCSIROGTSJMAMEDSCSIOINCOISKMAKORDITotal all DACs
# floats1678286474323179526352168133794252
New format tech166528547332117862635116713314146
SP offset deduced161627045031907842615116411604031
P=Praw-SP161627045031907842615116411604031
P type unknown491523212203171115
P(N)-SP(N+1)161627045031907842615116411604031
N+1 unknown62162441112141779221
Pcor varies in prof635313523414774078001567
Some Praw-Padj1306280412320179326136168133793789
Some valid SP1293280395320178626136168133793752
Some DAC vs Audit test1282280392320178626136168133793738
Results of DAC vs Audit Pcor comparisons
All agree5341841001960667216936001321
All diffs < 1dbar6956423011914511616604601392
Some diffs > 1dbar533262506757341527791025
All disagree190450067448712079893
Median Min Adjusted Profile Pressure
Med MPP < 2.5dbar41300010140023
Med MPP < 7.5dbar12312453173070777215331463803309
Med MPP < 12.5414747054123520229
Med MPP > 12.58141110110125062

Table updated on 10-Oct-2010


Explanation of categories


All values are the number of floats exhibiting the described conditions for each DAC.

# floats number of floats in total
New format tech tech file has new format

The following pressure correction aspects are deduced for each float based on the Surface Pressure Offset parameter name.
These deductions are recorded in this table.


SP offset deduced the Apex SP adjustment is known (or guessed)
P=Praw-SP pressure does required correction by subtracting SP
P type unknown don't know if is the above type of float
P(N)-SP(N+1) Nth profile should be corrected with N+1st SP
N+1 unknown don't know if is the above type of float
Pcor varies in prof Praw-Padj is not constant through profile
Some Praw-Padj float does have some Praw and corresponding Padj values
Some valid SP tech file has some plausible SP values
Some DAC vs Audit test some pressure correction comparisons can be made for these floats
All agree all DAC corrections agree exactly with our estimates
All diffs < 1dbar some discrepancy, but these are all < 1dbar
Some diffs > 1dbar some discrepancies are large (> 1 dbar)
All disagree all DAC corrections disagree with our estimates
The minimum (ie near-surface) profile pressure value will normally be about 5 dbar for the Apex floats. We examine the median of these values for each float series, as another coarse guide to correct calibration.
Med MPP < 2.5dbar (such cases often have MPP near zero - maybe self-calibrating pressure?)
Med MPP < 7.5dbar 2.5< MPP<7.5 - mostly close to 5 dbar
Med MPP < 12.5 7.5< MPP<12.5 - many of these are ~ 10dbar ??
Med MPP > 12.5 presumably some bad pressures

 

Legal Notice and Disclaimer | Copyright | Privacy | Page author: Jeff Dunn | Contact: Jeff.Dunn@csiro.au