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      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/PHASE_DELAY_DOXY/",
      "sensor": "OPTODE_DOXY",
      "units": "microsecond",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "TEMP_VOLTAGE_DOXY",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/TEMP_VOLTAGE_DOXY/",
      "sensor": "OPTODE_DOXY",
      "units": "volts",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "TEMP_DOXY",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/TEMP_DOXY/",
      "sensor": "OPTODE_DOXY",
      "units": "degree_Celsius",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "temp_doxy=1/(ta0+(ta1*L)+(ta2*L^2)+(ta3*L^3))-273.15;",
      "predeployment_calib_coefficient": "ta0=6.899261e-004;ta1=2.550544e-004;ta2=3.081117e-007;ta3=1.116952e-007;",
      "predeployment_calib_comment": ""
    },
    {
      "name": "DOXY",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/DOXY/",
      "sensor": "OPTODE_DOXY",
      "units": "micromole/kg",
      "accuracy": "5",
      "resolution": "0.4",
      "predeployment_calib_equation": "V=(PHASE_DELAY_DOXY+Pcoef1*PRES/1000)/39.457071; Ksv=C0+C1*TEMP_DOXY+C2*TEMP_DOXY^2; MLPL_DOXY=[(A0+A1*TEMP_DOXY+A2*V^2)/(B0+B1*V)-1]/Ksv; O2=MLPL_DOXY*Scorr*Pcorr; Scorr=A*exp[PSAL*(SolB0+SolB1*TS+SolB2*TS^2+SolB3*TS^3)+SolC0*PSAL^2]; A=[(1013.25-pH2O(TEMP,Spreset))/(1013.25-pH2O(TEMP,PSAL))]; pH2O(TEMP,S)=1013.25*exp[D0+D1*(100/(TEMP+273.15))+D2*ln((TEMP+273.15) /100)+D3*S]; Pcorr=1+((Pcoef2*TEMP+Pcoef3)*PRES)/1000; TS=ln[(298.15-TEMP)/(273.15+TEMP)]; DOXY[umol/kg]=44.6596*O2/rho, where rho is the potential density [kg/L] calculated from CTD data",
      "predeployment_calib_coefficient": "Pcoef1=0.115, Pcoef2=0.00022, Pcoef3=0.0419; A0=1.0513, A1=-1.5e-03, A2=4.3172e-01; B0=-2.5295e-001, B1=1.6650e+000; C0=1.0418e-001, C1=4.4420e-003, C2=6.1242e-005;E=1.1e-02;Spreset=0; D0=24.4543, D1=-67.4509, D2=-4.8489, D3=-5.44e-4; SolB0=-6.24523e-3, SolB1=-7.37614e-3, SolB2=-1.03410e-3, SolB3=-8.17083e-3; SolC0=-4.88682e-7;",
      "predeployment_calib_comment": ""
    },
    {
      "name": "PPOX_DOXY",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/PPOX_DOXY/",
      "sensor": "OPTODE_DOXY",
      "units": "mbar",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "FLUORESCENCE_CHLA",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/FLUORESCENCE_CHLA/",
      "sensor": "FLUOROMETER_CHLA",
      "units": "count",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "BETA_BACKSCATTERING532",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/BETA_BACKSCATTERING532/",
      "sensor": "BACKSCATTERINGMETER_BBP532",
      "units": "count",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "BETA_BACKSCATTERING700",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/BETA_BACKSCATTERING700/",
      "sensor": "BACKSCATTERINGMETER_BBP700",
      "units": "count",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "CHLA",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/CHLA/",
      "sensor": "FLUOROMETER_CHLA",
      "units": "mg/m3",
      "accuracy": "0.08",
      "resolution": "0.025",
      "predeployment_calib_equation": "CHLA=(FLUORESCENCE_CHLA-DARK_CHLA)*SCALE_CHLA;",
      "predeployment_calib_coefficient": "SCALE_CHLA=1.661E-03;DARK_CHLA=49;",
      "predeployment_calib_comment": ""
    },
    {
      "name": "BBP532",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/BBP532/",
      "sensor": "BACKSCATTERINGMETER_BBP532",
      "units": "m-1",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "BBP532=2*pi*khi *((BETA_BACKSCATTERING532-DARK_BACKSCATTERING532)*SCALE_BACKSCATTERING532-BETASW532);",
      "predeployment_calib_coefficient": "DARK_BACKSCATTERING532=50;SCALE_BACKSCATTERING532=1.263E-06;khi=1.076;BETASW532 (contribution of pure sea water) is calculated at 124 deg;",
      "predeployment_calib_comment": ""
    },
    {
      "name": "BBP700",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/BBP700/",
      "sensor": "BACKSCATTERINGMETER_BBP700",
      "units": "m-1",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "BBP700=2*pi*khi *((BETA_BACKSCATTERING700-DARK_BACKSCATTERING700)*SCALE_BACKSCATTERING700-BETASW700);",
      "predeployment_calib_coefficient": "DARK_BACKSCATTERING700=48;SCALE_BACKSCATTERING700=3.581E-07;khi=1.076;BETASW700 (contribution of pure sea water) is calculated at 150 deg;",
      "predeployment_calib_comment": ""
    },
    {
      "name": "TEMP_NITRATE",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/TEMP_NITRATE/",
      "sensor": "SPECTROPHOTOMETER_NITRATE",
      "units": "degree_Celsius",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "TEMP_SPECTROPHOTOMETER_NITRATE",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/TEMP_SPECTROPHOTOMETER_NITRATE/",
      "sensor": "SPECTROPHOTOMETER_NITRATE",
      "units": "degree_Celsius",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "HUMIDITY_NITRATE",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/HUMIDITY_NITRATE/",
      "sensor": "SPECTROPHOTOMETER_NITRATE",
      "units": "percent",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "UV_INTENSITY_DARK_NITRATE",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/UV_INTENSITY_DARK_NITRATE/",
      "sensor": "SPECTROPHOTOMETER_NITRATE",
      "units": "count",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "FIT_ERROR_NITRATE",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/FIT_ERROR_NITRATE/",
      "sensor": "SPECTROPHOTOMETER_NITRATE",
      "units": "dimensionless",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "UV_INTENSITY_NITRATE",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/UV_INTENSITY_NITRATE/",
      "sensor": "SPECTROPHOTOMETER_NITRATE",
      "units": "count",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "NITRATE",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/NITRATE/",
      "sensor": "SPECTROPHOTOMETER_NITRATE",
      "units": "umol/kg",
      "accuracy": "2",
      "resolution": "0.01",
      "predeployment_calib_equation": "The sensor returns UV_INTENSITY_DARK_NITRATE and UV_INTENSITY_NITRATE(Ntrans), a subset of continuous pixels of UV_INTENSITY_NITRATE(N), N = 1 to 256. The Ntrans indices span the interval [PIXEL_START, PIXEL_END] subset of the original array (1 to 256). Thus Ntrans(i) refers to pixel N = (PIXEL_START+i-1). PIXEL_START and PIXEL_END are defined from calibration data so that the [PIXEL_START, PIXEL_END] interval is the smallest interval of pixels that correspond to the [217 nm, 250 nm] interval of wavelengths. Only a subset of the [PIXEL_START, PIXEL_END] interval is processed to compute nitrate concentration. This subset is defined as the [PIXEL_FIT_START, PIXEL_FIT_END] interval which is the smallest interval of pixels that correspond to the [217 nm, 240 nm] interval of wavelengths (thus PIXEL_FIT_START = PIXEL_START). In the following equations the data are computed for each pixel R = PIXEL_FIT_START to PIXEL_FIT_END; ABSORBANCE_SW(R)=-log10[(UV_INTENSITY_NITRATE(R)-UV_INTENSITY_DARK_NITRATE)/UV_INTENSITY_REF_NITRATE(R)]; F(R,T)=(A+B*T)*exp[(C+D*T)*(OPTICAL_WAVELENGTH_UV(R)-OPTICAL_WAVELENGTH_OFFSET)]; E_SWA_INSITU(R)=E_SWA_NITRATE(R)*F(R,TEMP)/F(R,TEMP_CAL_NITRATE); ABSORBANCE_COR_NITRATE(R)=ABSORBANCE_SW(R)-(E_SWA_INSITU(R)*PSAL)*[1-(0.026*PRES/1000)]; Perform a multilinear regression to get MOLAR_NITRATE with estimated ABSORBANCE_COR_NITRATE(R) with ABSORBANCE_COR_NITRATE(R)=BASELINE_INTERCEPT+BASELINE_SLOPE*OPTICAL_WAVELENGTH_UV(R)+MOLAR_NITRATE*E_NITRATE(R); NITRATE=MOLAR_NITRATE/rho, where rho is the potential density [kg/L] calculated from CTD data.",
      "predeployment_calib_coefficient": "n/a",
      "predeployment_calib_comment": ""
    },
    {
      "name": "VRS_PH",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/VRS_PH/",
      "sensor": "TRANSISTOR_PH",
      "units": "volt",
      "accuracy": "",
      "resolution": "",
      "predeployment_calib_equation": "none",
      "predeployment_calib_coefficient": "none",
      "predeployment_calib_comment": ""
    },
    {
      "name": "PH_IN_SITU_FREE",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/PH_IN_SITU_FREE/",
      "sensor": "TRANSISTOR_PH",
      "units": "dimensionless",
      "accuracy": "0.005",
      "resolution": "0.0004",
      "predeployment_calib_equation": "k0T=k0+k2*TEMP; pcorr=f1*PRES+f2*PRES^2+f3*PRES^3+f4*PRES^4+f5*PRES^5+f6*PRES^6; k0TP=k0T+pcorr; Tk=273.15+TEMP; Cltotal=(0.99889/35.453*PSAL/1.80655)/(1-0.001005*PSAL); ADH=3.4286e-6*TEMP^2+6.7524e-4*TEMP+0.49172143; IonS=19.924*PSAL/(1000-1.005*PSAL); log10gammaHCl=[-ADH*sqrt(IonS)/(1+1.394*sqrt(IonS))]+[(0.08885-0.000111*TEMP)*IonS]; deltaVHCl=17.85+0.1044*TEMP-0.001316*TEMP^2; log10gammaHCLtP=log10gammaHCl+[deltaVHCl*(PRES/10)/(R*Tk*ln(10))/2/10]; PH_IN_SITU_FREE=[(VRS_PH-k0TP)/(R*Tk/F*ln(10))]+[ln(Cltotal)/ln(10)]+2*log10gammaHCLtP-log10(1-0.001005*PSAL); Stotal=(0.14/96.062)*(PSAL/1.80655); Khso4=exp{[-4276.1/Tk+141.328-23.093*ln(Tk)]+[(-13856/Tk+324.57-47.986*ln(Tk))*IonS^0.5]+[(35474/Tk-771.54+114.723*ln(Tk))*IonS]-[2698/Tk*IonS^1.5]+[1776/Tk*IonS^2]+ln(1-0.001005*PSAL)}; deltaVHSO4=-18.03+0.0466*TEMP+0.000316*TEMP^2; KappaHSO4=(-4.53+0.09*TEMP)/1000; lnKhso4fac=(-deltaVHSO4+0.5*KappaHSO4*(PRES/10))*(PRES/10)/(R*10*Tk); Khso4TPS=Khso4*exp(lnKhso4fac); PH_IN_SITU_TOTAL=PH_IN_SITU_FREE-log10(1+Stotal/Khso4TPS)",
      "predeployment_calib_coefficient": "R=8.31446;F=96485;k0=-1.2902;k2=-0.00084218;f0=-0.00092842;f1=3.6221e-06;f2=-2.4072e-09;f3=-7.9741e-13;f4=2.3507e-15;f5=-1.2389e-18;f6=2.1171e-22;",
      "predeployment_calib_comment": ""
    },
    {
      "name": "PH_IN_SITU_TOTAL",
      "URI_parameter": "http://vocab.nerc.ac.uk/collection/R03/current/PH_IN_SITU_TOTAL/",
      "sensor": "TRANSISTOR_PH",
      "units": "dimensionless",
      "accuracy": "0.005",
      "resolution": "0.0004",
      "predeployment_calib_equation": "k0T=k0+k2*TEMP; pcorr=f1*PRES+f2*PRES^2+f3*PRES^3+f4*PRES^4+f5*PRES^5+f6*PRES^6; k0TP=k0T+pcorr; Tk=273.15+TEMP; Cltotal=(0.99889/35.453*PSAL/1.80655)/(1-0.001005*PSAL); ADH=3.4286e-6*TEMP^2+6.7524e-4*TEMP+0.49172143; IonS=19.924*PSAL/(1000-1.005*PSAL); log10gammaHCl=[-ADH*sqrt(IonS)/(1+1.394*sqrt(IonS))]+[(0.08885-0.000111*TEMP)*IonS]; deltaVHCl=17.85+0.1044*TEMP-0.001316*TEMP^2; log10gammaHCLtP=log10gammaHCl+[deltaVHCl*(PRES/10)/(R*Tk*ln(10))/2/10]; PH_IN_SITU_FREE=[(VRS_PH-k0TP)/(R*Tk/F*ln(10))]+[ln(Cltotal)/ln(10)]+2*log10gammaHCLtP-log10(1-0.001005*PSAL); Stotal=(0.14/96.062)*(PSAL/1.80655); Khso4=exp{[-4276.1/Tk+141.328-23.093*ln(Tk)]+[(-13856/Tk+324.57-47.986*ln(Tk))*IonS^0.5]+[(35474/Tk-771.54+114.723*ln(Tk))*IonS]-[2698/Tk*IonS^1.5]+[1776/Tk*IonS^2]+ln(1-0.001005*PSAL)}; deltaVHSO4=-18.03+0.0466*TEMP+0.000316*TEMP^2; KappaHSO4=(-4.53+0.09*TEMP)/1000; lnKhso4fac=(-deltaVHSO4+0.5*KappaHSO4*(PRES/10))*(PRES/10)/(R*10*Tk); Khso4TPS=Khso4*exp(lnKhso4fac); PH_IN_SITU_TOTAL=PH_IN_SITU_FREE-log10(1+Stotal/Khso4TPS)",
      "predeployment_calib_coefficient": "R=8.31446;F=96485;k0=-1.2902;k2=-0.00084218;f0=-0.00092842;f1=3.6221e-06;f2=-2.4072e-09;f3=-7.9741e-13;f4=2.3507e-15;f5=-1.2389e-18;f6=2.1171e-22;",
      "predeployment_calib_comment": ""
    }
  ],
  "sci:doi": "10.17882/42182",
  "sci:citation": "Argo (2024). Argo float data and metadata from Global Data Assembly Centre (Argo GDAC). SEANOE. https://doi.org/10.17882/42182",
  "title": "Platform2902884",
  "extent": {
    "spatial": {
      "bbox": [
        [
          125.0489,
          12.4773,
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          18.1455
        ]
      ]
    },
    "temporal": {
      "interval": [
        [
          "2023-06-20T20:18:20Z",
          "2025-01-14T05:23:00Z"
        ]
      ]
    }
  },
  "license": "CC-BY-4.0",
  "providers": [
    {
      "name": "CSIO, HANGZHOU",
      "roles": [
        "producer"
      ]
    },
    {
      "name": "CSIO",
      "roles": [
        "processor"
      ]
    },
    {
      "name": "CORIOLIS",
      "roles": [
        "host"
      ]
    }
  ],
  "assets": {
    "Rtraj.nc": {
      "href": "https://data-argo.ifremer.fr/dac/csio/2902884/2902884_Rtraj.nc",
      "type": "application/x-netcdf",
      "title": "trajectory file",
      "file:size": 556088,
      "roles": [
        "data",
        "metadata"
      ]
    },
    "meta.nc": {
      "href": "https://data-argo.ifremer.fr/dac/csio/2902884/2902884_meta.nc",
      "type": "application/x-netcdf",
      "title": "metadata file",
      "file:size": 330624,
      "roles": [
        "metadata"
      ]
    },
    "Sprof.nc": {
      "href": "https://data-argo.ifremer.fr/dac/csio/2902884/2902884_Sprof.nc",
      "type": "application/x-netcdf",
      "title": "Sprof file",
      "file:size": 2356226,
      "roles": [
        "data",
        "metadata"
      ]
    },
    "prof.nc": {
      "href": "https://data-argo.ifremer.fr/dac/csio/2902884/2902884_prof.nc",
      "type": "application/x-netcdf",
      "title": "profiles file",
      "file:size": 1211844,
      "roles": [
        "data",
        "metadata"
      ]
    },
    "tech.nc": {
      "href": "https://data-argo.ifremer.fr/dac/csio/2902884/2902884_tech.nc",
      "type": "application/x-netcdf",
      "title": "technical file",
      "file:size": 507636,
      "roles": [
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    }
  }
}