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Questions sur les mouillages. position GPS vs position nominale PRES vs DEPH . Position GPS vs position nominale. Quel champ utiliser : LON/LAT, GPS_LON/GPS_LAT ?? Ordre de grandeur raisonnable du rayon d’évitement Proposer un test d’écart max.

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slide1

Questions sur les mouillages

  • position GPS vs position nominale
  • PRES vs DEPH
slide2

Position GPS vs position nominale

  • Quel champ utiliser : LON/LAT, GPS_LON/GPS_LAT ??
  • Ordre de grandeur raisonnable du rayon d’évitement
  • Proposer un test d’écart max

Doubles positions de certaines bouées : positions théoriques dans les fichiers MO, positions vraies (GPS ou Argos) dans les fichiers TE

Distance entre MO et TE pour WMO 31003

ΔLon=0.48°= 53.28 km ΔLat=0.11° = 12.21 km Distance ~= 54.66 km

 Position nominale probablement fausse

slide3

Position GPS vs position nominale

GL_LATEST_TS_MO_31003_20120103.nc

data:

TIME = 22647.5, 22647.5833333333,

TIME_QC = 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 ;

LATITUDE = -7.916, -7.916, -7.94, -7.921, -7.913, -7.915, -7.915, -7.914,

-7.905, -7.905, -7.914, -7.914, -7.917, -7.906, -7.923 ;

LONGITUDE = -30.513, -30.513, -30.519, -30.511, -30.516, -30.51, -30.51,

-30.508, -30.508, -30.508, -30.509, -30.512, -30.507, -30.5, -30.513 ;

POSITION_QC = 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 ;

DEPH =

20, 40, 60, 80, 100, 120, 140, 300, 500,

DEPH_QC =

1, 1, 1, 1, 1, 1, 1, 1, 1,

TEMP =

27.13, 27.12, 27.11, 27.11, 26.87, 23.11, 20.25, 9.92, 7.67,

TEMP_QC =

1, 1, 1, 1, 1, 1, 1, 2, 2,

PSAL =

36.44, 36.44, _, _, _, 36.64, _, _, _,

PSAL_QC =

1, 1, _, _, _, 4, _, _, _,

+champs:

WSPD:long_name = "HORIZONTAL WIND SPEED" ;

RELH:long_name = "relative humidity" ;

DRYT:long_name = "DRY BULB TEMPERATURE" ;

WDIR:long_name = "WIND DIRECTION REL. TRUE NORTH" ;

GL_LATEST_PR_MO_31003_20120103.nc

data:

TIME = 22647.5 ;

TIME_QC = 1 ;

LATITUDE = -8 ;

LONGITUDE = -30 ;

POSITION_QC = 1 ;

DATA_MODE = "R" ;

DIRECTION = "U" ;

DEPH =

20, 40, 60, 80, 100, 120, 140, 300, 500 ;

DEPH_QC =

1, 1, 1, 1, 1, 1, 1, 1, 1 ;

TEMP =

27.13, 27.12, 27.11, 27.11, 26.87, 23.11, 20.25, 9.92, 7.67 ;

TEMP_QC =

1, 1, 1, 1, 1, 1, 1, 1, 1 ;

PSAL =

36.44, 36.441, _, _, _, 36.644, _, _, _ ;

PSAL_QC

1, 1, _, _, _, 1, _, _, _ ;

GL_LATEST_PR_TE_31003_20120103.nc

data:

TIME = 22647.5 ;

TIME_QC = 1 ;

LATITUDE = -7.914 ;

LONGITUDE = -30.508 ;

POSITION_QC = 1 ;

DATA_MODE = "R" ;

DIRECTION = "U" ;

DEPH =

20, 40, 60, 80, 100, 120, 140, 300, 500 ;

DEPH_QC =

1, 1, 1, 1, 1, 1, 1, 1, 1 ;

PSAL =

36.44, 36.44, _, _, _, 36.64, _, _, _ ;

PSAL_QC =

1, 1, _, _, _, 1, _, _, _ ;

TEMP =

27.13, 27.12, 27.11, 27.11, 26.87, 23.11, 20.25, 9.92, 7.67 ;

TEMP_QC =

1, 1, 1, 1, 1, 1, 1, 1, 1 ;

PMEL

Données distribuées qd requête sur site web

GTS

OceanSites

slide4

PRES vs DEPH

  • MO_LATEST_TS_MO_68422_20110820.nc contient les champs DEPH et PRES
  • DEPH=
  • 0, 1, 20, 50, 75, 100, 250, 400, 500, 600, 1000, 1673,
  • PRES =
  • _, _, _, _, _, 110.28, _, _, _, _, _, _,
  • TEMP =
  • _, 26.786, 26.299, 18.257, 17.065, 16.705, _, _, _, _, _, 13.812,
  • PSAL =
  • _, 38.953, 38.956, 38.727, 38.916, 39.065, _, _, _, _, _, 38.77,
  • Commentaire : un calcul de pression à partir de DEPH/TEMP/PSAL = 100.7064 dbar à 100 m de profondeur
slide5

PRES vs DEPH

TEMP =

_, 16.944, 17.061, 17.08, 16.992, 16.046, _, _, _, _, _, 13.846,

_, 16.905, 16.963, 16.968, 16.235, 16.039, _, _, _, _, _, 13.846,

_, 16.878, 16.924, 16.919, 16.133, 15.973, _, _, _, _, _, 13.846,

_, 16.905, 16.909, 16.919, 16.367, 15.929, _, _, _, _, _, 13.846,

_, 16.925, 16.924, 16.924, 16.665, 16.138, _, _, _, _, _, 13.846,

_, 16.931, 16.938, 16.938, 16.919, 16.196, _, _, _, _, _, 13.846,

_, 16.925, 16.958, 16.953, 16.938, 16.116, _, _, _, _, _, 13.839,

_, 16.931, 16.943, 16.963, 16.836, 16.097, _, _, _, _, _, 13.841 ;

TEMP_QC =

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 1,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 1,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 1,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 3,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 3,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 3,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 1,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 1 ;

PSAL =

_, 38.796, 38.736, 38.834, 38.898, 38.969, _, _, _, _, _, 38.775,

_, 38.782, 38.731, 38.825, 38.945, 38.983, _, _, _, _, _, 38.775,

_, 38.787, 38.73, 38.827, 38.97, 39.019, _, _, _, _, _, 38.776,

_, 38.794, 38.727, 38.822, 38.929, 38.976, _, _, _, _, _, 38.775,

_, 38.794, 38.726, 38.822, 38.898, 38.951, _, _, _, _, _, 38.776,

_, 38.796, 38.726, 38.822, 38.86, 38.931, _, _, _, _, _, 38.776,

_, 38.789, 38.729, 38.822, 38.86, 38.953, _, _, _, _, _, 38.775,

_, 38.799, 38.727, 38.822, 38.857, 38.954, _, _, _, _, _, 38.775 ;

PSAL_QC =

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 3,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 3,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 3,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 3,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 3,

0, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 3,

0, 1, 1, 3, 1, 1, 9, 9, 9, 9, 9, 3,

0, 1, 1, 3, 1, 1, 9, 9, 9, 9, 9, 3 ;

ATMS =

996.406, _, _, _, _, _, _, _, _, _, _, _,

996.858, _, _, _, _, _, _, _, _, _, _, _,

997.942, _, _, _, _, _, _, _, _, _, _, _,

1001.013, _, _, _, _, _, _, _, _, _, _, _,

1001.736, _, _, _, _, _, _, _, _, _, _, _,

1004.175, _, _, _, _, _, _, _, _, _, _, _,

1006.523, _, _, _, _, _, _, _, _, _, _, _,

1008.42, _, _, _, _, _, _, _, _, _, _, _ ;

netcdf MO_LATEST_TS_MO_68422_20120107 {

data:

TIME = 22651, 22651.125, 22651.25, 22651.375, 22651.5, 22651.625, 22651.75,

22651.875 ;

TIME_QC = 1, 1, 1, 1, 1, 1, 1, 1 ;

DEPH =

0, 1, 20, 50, 75, 100, 250, 400, 500, 600, 1000, 1673,

0, 1, 20, 50, 75, 100, 250, 400, 500, 600, 1000, 1673,

0, 1, 20, 50, 75, 100, 250, 400, 500, 600, 1000, 1673,

0, 1, 20, 50, 75, 100, 250, 400, 500, 600, 1000, 1673,

0, 1, 20, 50, 75, 100, 250, 400, 500, 600, 1000, 1673,

0, 1, 20, 50, 75, 100, 250, 400, 500, 600, 1000, 1673,

0, 1, 20, 50, 75, 100, 250, 400, 500, 600, 1000, 1673,

0, 1, 20, 50, 75, 100, 250, 400, 500, 600, 1000, 1673 ;

DEPH_QC =

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ;

LATITUDE = 36.829 ;

LONGITUDE = 21.608 ;

POSITION_QC = 1 ;

GPS_LATITUDE = 36.8262, 36.8262, 36.8262, 36.8188, 36.8188, 36.8286,

36.8262, 36.8164 ;

GPS_LONGITUDE = 21.6089, 21.6064, 21.6016, 21.604, 21.5991, 21.5942,

21.5942, 21.5967 ;

PRES =

_, _, _, _, _, 106.46, _, _, _, _, _, _,

_, _, _, _, _, 107.28, _, _, _, _, _, _,

_, _, _, _, _, 109.46, _, _, _, _, _, _,

_, _, _, _, _, 109.67, _, _, _, _, _, _,

_, _, _, _, _, 110.56, _, _, _, _, _, _,

_, _, _, _, _, 109.33, _, _, _, _, _, _,

_, _, _, _, _, 108.51, _, _, _, _, _, _,

_, _, _, _, _, 109.26, _, _, _, _, _, _ ;

PRES_QC =

0, 0, 9, 9, 9, 1, 9, 0, 0, 0, 0, 0,

0, 0, 9, 9, 9, 1, 9, 0, 0, 0, 0, 0,

0, 0, 9, 9, 9, 1, 9, 0, 0, 0, 0, 0,

0, 0, 9, 9, 9, 1, 9, 0, 0, 0, 0, 0,

0, 0, 9, 9, 9, 1, 9, 0, 0, 0, 0, 0,

0, 0, 9, 9, 9, 1, 9, 0, 0, 0, 0, 0,

0, 0, 9, 9, 9, 1, 9, 0, 0, 0, 0, 0,

0, 0, 9, 9, 9, 1, 9, 0, 0, 0, 0, 0 ;

(toutes les 3 heures)

CUSP:long_name = "CURRENT SPEED" ;

SCDT:long_name = "SEA SURF CURRENT DIR. REL T. N" ;

DOX1:long_name = "DISSOLVED OXYGEN" ;

CPH1:long_name = "CHLOROPHYLL-A TOTAL" ;

ATMS:long_name = "atmospheric pressure atsealevel" ;

DRYT:long_name = "DRY BULB TEMPERATURE" ;

WSPD:long_name = "HORIZONTAL WIND SPEED"

GSPD:long_name = "GUST WIND SPEED" ;

WDIR:long_name = "WIND DIRECTION REL. TRUE NORTH" ;

VTZA:long_name = "AVER ZERO CROSSING WAVE PERIOD" ;

VTDH:long_name = "SIGNIFICANT WAVE HEIGHT" ;

VDIR:long_name = "WAVE DIRECTION REL. TRUE NORTH" ;

slide6

Questions sur les données qui ne possèdent pas d’indication de profondeur – DB, TSG, NIVA

MYO-GO-01,ftp://eftp.ifremer.fr/data/latest/20120102/GO_LATEST_TS_FB_NIVA.TF_20120102.nc,69.9803,70.2421,23.1087,70.2421,2012-01-02T00:00:47Z,2012-01-02T08:15:00Z,NIVA,2012-01-02T12:20:01Z,R,TEMP DOXY FLUO PSAL

netcdf GO_LATEST_TS_FB_NIVA.TF_20120102 {

dimensions:

LATITUDE = 494 ;

POSITION = 494 ;

DEPTH = 1 ;

LONGITUDE = 494 ;

TIME = 494 ;

data:

DEPTH = 5 ;  mais pas dans le fichier index

TEMP =

15.038,

15.036,

15.035,

15.033,

15.031,

15.03,

15.028,

15.027,

PSAL =

31.16,

31.16,

31.161,

31.161,

31.162,

31.162,

31.162,

31.163,

MYO-GLOBAL-01,ftp://eftp.ifremer.fr/data/latest/20120106/GL_LATEST_TS_TS_5BAD2_20120106.nc,-19.5167,-19.5167,-158.867,-158.867,2012-01-06T18:00:00Z,2012-01-06T18:00:00Z,IRD BREST,2012-01-07T03:07:40Z,R,CO06 PSAL

netcdf GL_LATEST_TS_TS_5BAD2_20120106 {

dimensions:

TIME = UNLIMITED ; // (1 currently)

DEPTH = 1 ;

LATITUDE = 1 ;

LONGITUDE = 1 ;

POSITION = 1 ;

data:

DEPTH = _ ;

DEPTH_QC = _ ;

PSAL =

35.68 ;

PSAL_QC =

1 ;

CO06 =

29 ;

CO06_QC =

0 ;

CO06:long_name = "temperaturefromtsg" ; - température de la cuve  biais à prendre en compte avant assimilation – trop compliqué pour le temps réel

MYO-GLOBAL-01,ftp://eftp.ifremer.fr/data/latest/20111218/GL_LATEST_TS_TS_FMCY_20111218.nc,-6.48887,-6.442,6.02135,6.03698,2011-12-18T00:04:28Z,2011-12-18T23:58:57Z,SHOM,2011-12-20T02:55:45Z,R,PSAL CO06 CNDC TEMP

CNDC: sea_water_electrical_conductivity

TEMP: sea water temperature – température de la prise d’eau – ok à assimiler dans Mercator

MYO-GLOBAL-01,ftp://eftp.ifremer.fr/data/latest/20120108/GL_LATEST_TS_DB_14551_20120108.nc,9.573,9.715,87.791,87.898,2012-01-08T01:25:00Z,2012-01-08T21:56:00Z,UNKNOWN INSTITUTION,2012-01-09T04:13:57Z,R,TEMP

netcdf GL_LATEST_TS_DB_14551_20120108 {

dimensions:

TIME = UNLIMITED ; // (21 currently)

DEPTH = 1 ;

LATITUDE = 21 ;

LONGITUDE = 21 ;

POSITION = 21 ;

data:

DEPTH = _ ;

DEPTH_QC = _ ;

TEMP =

28.2,

28.2,

28.2,

28.3,

28.4,

28.4,

MYO-GLOBAL-01,ftp://eftp.ifremer.fr/data/latest/20120108/GL_LATEST_TS_DB_13983_20120108.nc,31.888,31.961,-35.382,-35.332,2012-01-08T06:23:00Z,2012-01-08T11:22:00Z,UNKNOWN INSTITUTION,2012-01-08T19:39:11Z,R,DEPH TEMP PSAL

netcdf GL_LATEST_TS_DB_13983_20120108 {

dimensions:

TIME = UNLIMITED ; // (10 currently)

DEPTH = 2 ;

LATITUDE = 10 ;

LONGITUDE = 10 ;

POSITION = 10 ;

data:

DEPTH = _, 0 ;

DEPTH_QC = _, 1 ;

DEPH =

_, 0,

_, 0,

_, 0,

_, 0,

_, 0,

_, 0,

_, 0,

_, 0,

_, 0,

_, 0 ;

DEPH_QC =

_, 1,

_, 1,

_, 1,

_, 1,

_, 1,

_, 1,

_, 1,

_, 1,

_, 1,

_, 1 ;

TEMP =

21.5, 21.49,

21.5, 21.51,

21.5, 21.49,

21.5, 21.51,

21.5, 21.51,

21.5, 21.51,

21.5, 21.51,

21.5, 21.5,

21.5, 21.5,

21.5, 21.49 ;

TEMP_QC =

1, 1,

1, 1,

1, 1,

1, 1,

1, 1,

1, 1,

1, 1,

1, 1,

1, 1,

1, 1 ;

PSAL =

_, 37.02,

_, 37.01,

_, 37.01,

_, 37.02,

_, 37.03,

_, 37.02,

_, 37.01,

_, 37.03,

_, 37.02,

_, 37.02 ;

PSAL_QC =

_, 4,

_, 4,

_, 4,

_, 4,

_, 4,

_, 4,

_, 4,

_, 4,

_, 4,

_, 4 ;

MYO-GLOBAL-01,ftp://eftp.ifremer.fr/data/latest/20120108/GL_LATEST_TS_DB_11908_20120108.nc,13.397,13.457,59.633,59.69,2012-01-08T00:50:00Z,2012-01-08T23:50:00Z,UNKNOWN INSTITUTION,2012-01-09T18:14:27Z,R,TEMP ATMP ATPT ATMS

netcdf GL_LATEST_TS_DB_11908_20120108 {

dimensions:

TIME = UNLIMITED ; // (24 currently)

DEPTH = 1 ;

LATITUDE = 24 ;

LONGITUDE = 24 ;

POSITION = 24 ;

data:

DEPTH = _ ;

DEPTH_QC = _ ;

TEMP =

26.2,

26.2,

26.2,

26.2,

26.2,

TEMP_QC =

1,

1,

1,

1,