Argo Pressure correction audit report pages

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 floats)
AOML BODC CORIOLIS CSIRO NMDIS JMA MEDS CSIO INCOIS KMA KORDI Total all DACs

# floats 3977 363 1262 474 1 1073 317 109 237 147 119 8079

Any DM 2759 297 894 334 0 809 218 63 146 114 0 5634

DM - missing P ADJ 1 0 59 0 0 0 12 2 0 18 0 92

RT - missing P ADJ 1495 95 4 0 1 13 59 66 1 2 66 1802

New format tech 3972 362 1262 473 1 1064 316 99 236 147 91 8023

SP offset deduced 3972 362 1262 473 1 1064 316 99 236 147 91 8023

P=Praw-SP 2691 321 696 468 0 904 280 95 227 130 87 5899

P type unknown 254 18 104 6 0 34 37 14 6 17 32 522

Pcor varies in prof 0 0 0 0 0 5 12 0 0 0 0 17

Some Praw-Padj 2889 339 1068 464 0 948 302 63 222 130 55 6480

Some valid SP 3773 345 1161 468 1 1035 308 95 231 130 0 7547

Some DAC vs Audit test 2887 339 1065 464 0 945 302 57 222 130 0 6411

Results of DAC vs Audit Pcor comparisons - Auto-correcting floats

All agree 822 24 398 0 0 7 0 0 0 0 0 1251

All diffs < 1dbar 2 0 0 0 0 43 0 0 0 0 0 45

Some diffs > 1dbar 1 0 0 0 0 21 0 0 0 0 0 22

80% > 1dbar 0 0 0 0 0 0 0 0 0 0 0 0

Results of DAC vs Audit Pcor comparisons - Correction-required floats

Prof data but no SP 1 0 3 0 0 3 0 0 0 0 55 62

All agree 1678 248 283 379 0 757 128 34 134 40 0 3681

All diffs < 1dbar 349 64 297 75 0 83 78 18 67 54 0 1085

Some diffs > 1dbar 29 3 18 10 0 27 72 5 21 36 0 221

80% > 1dbar 2 0 3 0 0 1 46 2 9 15 0 78

Median Min Adjusted Profile Pressure

Med MPP < 2.5dbar 39 5 217 4 0 32 1 0 15 0 0 313

Med MPP < 7.5dbar 2676 271 758 440 0 846 235 48 204 47 50 5575

Med MPP < 12.5 137 6 51 14 0 68 64 15 2 54 5 416

Med MPP > 12.5 26 57 36 5 0 1 1 0 1 28 0 155

Pressure Correction [apex floats only]
AOML BODC CORIOLIS CSIRO NMDIS JMA MEDS CSIO INCOIS KMA KORDI Total all DACs

# floats 1955 335 596 461 0 848 282 89 211 138 93 5008

Any DM 1188 273 413 322 0 712 188 57 140 114 0 3407

DM - missing P ADJ 0 0 48 0 0 0 12 2 0 18 0 80

RT - missing P ADJ 1118 95 4 0 0 7 59 66 1 2 66 1418

New format tech 1953 334 596 461 0 840 282 89 210 138 91 4994

SP offset deduced 1953 334 596 461 0 840 282 89 210 138 91 4994

P=Praw-SP 1892 319 584 456 0 838 280 87 207 130 87 4880

P type unknown 51 16 12 5 0 10 2 2 4 8 6 116

Pcor varies in prof 0 0 0 0 0 5 12 0 0 0 0 17

Some Praw-Padj 1530 315 590 453 0 838 278 57 207 130 55 4453

Some valid SP 1905 319 587 456 0 835 280 87 207 130 0 4806

Some DAC vs Audit test 1529 315 587 453 0 835 278 57 207 130 0 4391

Results of DAC vs Audit Pcor comparisons - Auto-correcting floats

All agree 0 0 0 0 0 0 0 0 0 0 0 0

All diffs < 1dbar 0 0 0 0 0 0 0 0 0 0 0 0

Some diffs > 1dbar 0 0 0 0 0 0 0 0 0 0 0 0

80% > 1dbar 0 0 0 0 0 0 0 0 0 0 0 0

Results of DAC vs Audit Pcor comparisons - Correction-required floats

Prof data but no SP 0 0 3 0 0 3 0 0 0 0 55 61

All agree 1156 248 267 369 0 748 128 34 133 40 0 3123

All diffs < 1dbar 344 64 297 74 0 75 78 18 64 54 0 1068

Some diffs > 1dbar 29 3 17 10 0 11 72 5 10 36 0 193

80% > 1dbar 2 0 2 0 0 0 46 2 0 15 0 67

Median Min Adjusted Profile Pressure

Med MPP < 2.5dbar 6 1 12 4 0 0 1 0 15 0 0 39

Med MPP < 7.5dbar 1463 252 513 435 0 833 234 48 189 47 50 4064

Med MPP < 12.5 53 5 47 12 0 3 41 9 2 54 5 231

Med MPP > 12.5 7 57 15 1 0 1 1 0 1 28 0 111

Table updated on 05-Dec-2011, GDAC state as at 25 Nov 2011

Explanation of categories

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

# floats number of floats in total

Any DM number of floats with any DM files

DM - missing P ADJ floats with some DM files having empty or missing PRES_ADJUSTED (where there is a non-empty PRES profile)

RT - missing P ADJ floats with some RT files having empty or missing PRES_ADJUSTED (where there is a non-empty PRES profile)

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 (ie 5 dbar, or 0 dbar) can be resolved (or guessed) from the surface pressure parameter name

P=Praw-SP pressure does required correction by subtracting SP

P type unknown don't know if is the above type of float

Pcor varies in prof Praw-Padj is not constant through profile. This now excludes SOLOs where deepest ADJUSTED pressure is correct forincomplete bin averaging.

Some Praw-Padj float does have some Praw and corresponding Padj values, so a "DAC correction" can be resolved.

Some valid SP tech file has some plausible SP values (only required where pressure has to be corrected with SP)

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)

80% > 1dbar 80% of DAC corrections disagree with our estimatesby at least 1dbar

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

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