# ACE_FTS_L2_main

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of ACE_FTS_L2_main data.

field name

type

dimensions

unit

description

datetime

double

{time}

[seconds since 2000-01-01]

date and time of occultation 30 km geometric tangent point

datetime_start

double

{time}

[seconds since 2000-01-01]

date and time of start of measurement

datetime_stop

double

{time}

[seconds since 2000-01-01]

date and time of end of measurement

orbit_index

int32

absolute orbit number

latitude

double

{vertical}

[degree_north]

latitude of 30 km geometric tangent point for occultation

longitude

double

{vertical}

[degree_east]

longitude of 30 km geometric tangent point for occultation

altitude

double

{vertical}

[km]

tangent altitude grid for retrieved parameters and species

temperature

double

{vertical}

[K]

temperature

pressure

double

{vertical}

[hPa]

pressure

number_density

double

{vertical}

[cm^-3]

atmospheric density

H2O_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for H2O

H2O_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for H2O. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

O3_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for O3

O3_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for O3. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

N2O_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for N2O

N2O_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for N2O. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

CO_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for CO

CO_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for CO. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

CH4_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for CH4

CH4_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for CH4. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

NO_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for NO

NO_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for NO. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

NO2_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for NO2

NO2_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for NO2. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

HNO3_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for HNO3

HNO3_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for HNO3. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

HF_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for HF

HF_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for HF. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

HCl_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for HCl

HCl_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for HCl. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

OCS_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for OCS

OCS_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for OCS. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

N2O5_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for N2O5

N2O5_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for N2O5. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

ClONO2_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for ClONO2

ClONO2_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for ClONO2. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

HCN_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for HCN

HCN_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for HCN. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

CH3Cl_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for CH3Cl

CH3Cl_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for CH3Cl. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

CF4_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for CF4

CF4_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for CF4. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

CCl2F2_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for CCl2F2

CCl2F2_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for CCl2F2. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

CCl3F_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for CCl3F

CCl3F_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for CCl3F. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

COF2_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for COF2

COF2_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for COF2. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

C2H6_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for C2H6

C2H6_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for C2H6. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

C2H2_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for C2H2

C2H2_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for C2H2. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

CHF2Cl_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for CHF2Cl

CHF2Cl_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for CHF2Cl. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

SF6_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for SF6

SF6_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for SF6. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

ClO_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for ClO

ClO_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for ClO. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

HO2NO2_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for HO2NO2

HO2NO2_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for HO2NO2. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

H2O2_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for H2O2

H2O2_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for H2O2. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

HOCl_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for HOCl

HOCl_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for HOCl. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

N2_volume_mixing_ratio

double

{vertical}

[ppmv]

volume mixing ratio for N2

N2_volume_mixing_ratio_uncertainty

double

{vertical}

[ppmv]

volume mixing ratio uncertainty for N2. If this value is -888 the vmr was not retrieved but obtained by scaling the a priori value

index

int32

{time}

zero-based index of the sample within the source product

## Mapping description

The table below details where and how each variable was retrieved from the input product.

field name

mapping description

datetime

path

/date

description

date field from header section converted to seconds since 2000-01-01

datetime_start

path

/start_time

description

start_time field from header section converted to seconds since 2000-01-01

datetime_stop

path

/end_time

description

end_time field from header section converted to seconds since 2000-01-01

orbit_index

description

extracted from the filename (assuming ssXXXXX… or srXXXXX… format); set to 0 if extraction of the value was not possible

latitude

path

/latitude

description

longitude

path

/longitude

description

altitude

path

/data section/z

temperature

path

/data section/T

pressure

path

/data section/P (atm)

number_density

path

/data section/dens

H2O_volume_mixing_ratio

path

/data section/H2O

H2O_volume_mixing_ratio_uncertainty

path

/data section/H2O_err

O3_volume_mixing_ratio

path

/data section/O3

O3_volume_mixing_ratio_uncertainty

path

/data section/O3_err

N2O_volume_mixing_ratio

path

/data section/N2O

N2O_volume_mixing_ratio_uncertainty

path

/data section/N2O_err

CO_volume_mixing_ratio

path

/data section/CO

CO_volume_mixing_ratio_uncertainty

path

/data section/CO_err

CH4_volume_mixing_ratio

path

/data section/CH4

CH4_volume_mixing_ratio_uncertainty

path

/data section/CH4_err

NO_volume_mixing_ratio

path

/data section/NO

NO_volume_mixing_ratio_uncertainty

path

/data section/NO_err

NO2_volume_mixing_ratio

path

/data section/NO2

NO2_volume_mixing_ratio_uncertainty

path

/data section/NO2_err

HNO3_volume_mixing_ratio

path

/data section/HNO3

HNO3_volume_mixing_ratio_uncertainty

path

/data section/HNO3_err

HF_volume_mixing_ratio

path

/data section/HF

HF_volume_mixing_ratio_uncertainty

path

/data section/HF_err

HCl_volume_mixing_ratio

path

/data section/HCl

HCl_volume_mixing_ratio_uncertainty

path

/data section/HCl_err

OCS_volume_mixing_ratio

path

/data section/OCS

OCS_volume_mixing_ratio_uncertainty

path

/data section/OCS_err

N2O5_volume_mixing_ratio

path

/data section/N2O5

N2O5_volume_mixing_ratio_uncertainty

path

/data section/N2O5_err

ClONO2_volume_mixing_ratio

path

/data section/ClONO2

ClONO2_volume_mixing_ratio_uncertainty

path

/data section/ClONO2_err

HCN_volume_mixing_ratio

path

/data section/HCN

HCN_volume_mixing_ratio_uncertainty

path

/data section/HCN_err

CH3Cl_volume_mixing_ratio

path

/data section/CH3Cl

CH3Cl_volume_mixing_ratio_uncertainty

path

/data section/CH3Cl_err

CF4_volume_mixing_ratio

path

/data section/CF4

CF4_volume_mixing_ratio_uncertainty

path

/data section/CF4_err

CCl2F2_volume_mixing_ratio

path

/data section/CCl2F2

CCl2F2_volume_mixing_ratio_uncertainty

path

/data section/CCl2F2_err

CCl3F_volume_mixing_ratio

path

/data section/CCl3F

CCl3F_volume_mixing_ratio_uncertainty

path

/data section/CCl3F_err

COF2_volume_mixing_ratio

path

/data section/COF2

COF2_volume_mixing_ratio_uncertainty

path

/data section/COF2_err

C2H6_volume_mixing_ratio

path

/data section/C2H6

C2H6_volume_mixing_ratio_uncertainty

path

/data section/C2H6_err

C2H2_volume_mixing_ratio

path

/data section/C2H2

C2H2_volume_mixing_ratio_uncertainty

path

/data section/C2H2_err

CHF2Cl_volume_mixing_ratio

path

/data section/CHF2Cl

CHF2Cl_volume_mixing_ratio_uncertainty

path

/data section/CHF2Cl_err

SF6_volume_mixing_ratio

path

/data section/SF6

SF6_volume_mixing_ratio_uncertainty

path

/data section/SF6_err

ClO_volume_mixing_ratio

path

/data section/ClO

ClO_volume_mixing_ratio_uncertainty

path

/data section/ClO_err

HO2NO2_volume_mixing_ratio

path

/data section/HO2NO2

HO2NO2_volume_mixing_ratio_uncertainty

path

/data section/HO2NO2_err

H2O2_volume_mixing_ratio

path

/data section/H2O2

H2O2_volume_mixing_ratio_uncertainty

path

/data section/H2O2_err

HOCl_volume_mixing_ratio

path

/data section/HOCl

HOCl_volume_mixing_ratio_uncertainty

path

/data section/HOCl_err

N2_volume_mixing_ratio

path

/data section/N2

N2_volume_mixing_ratio_uncertainty

path

/data section/N2_err