MASCDB triplet data

Contents

MASCDB triplet data#

The file MASCdb_triplet.parquet contains the attributes listed in the table below.

Parameter

Units

Type

Long name

Reference / Format / Algorithm

Global information

datetime

datetime

campaign

string

Field campaign string

latitude

deg

float

WGS84 latitude

longitude

deg

float

WGS84 longitude

altitude

m

float

Flake information

flake_id

string
Unique flake ID
e.g. 2015.02.10_11.55.10_flake_4
YYYY.MM.DD_HH.mm.ss_flake_flake_number_tmp

flake_number_tmp

string
Temporary flake ID
(not unique)

flake_quality_xhi

float
Average quality ind
(on the three cams)

“xi” in Praz et al, 2017

flake_fallspeed

m/s

float

Recorded fallspeed

flake_n_roi

int
Average N. of ROIs
(on the three cams)

flake_Dmax

m

float
Maximum Dmax
(on the three cams)

Table A1:4 Praz et al, 2017

Riming estimation information

riming_deg_level

float
Continuous riming
degree level

R_c in Praz et al, 2017

riming_class_id

int
Discrete riming
degree class ID
Praz et al, 2017
0: undefined, 1: unrimed, 2: rimed
3: densely-rimed, 4: graupel-like, 5: graupel

riming_class_prob

float
Riming classif.
probability

Praz et al, 2017

riming_class_name

string
Discrete riming
degree class name

See riming_class_id

Melting estimation information

melting_class_id

int
Discrete melting
class ID
Praz et al, 2017
0: dry, 1: melting

melting_prob

float

Melting probability
Praz et al, 2017
If rounded, it yields melting_class_id

melting_class_name

string
Discrete melting
class name

See melting_class_id

Hydrometeor type estimation information

snowflake_class_name

string
Hydrometeor
class name
Praz et al, 2017 citePraz
See snowflake_class_id

snowflake_class_id

int
Hydrometeor
class ID
Praz et al, 2017 citePraz
1: small_particle, 2: columnar_crystal,
3: planar_crystal, 4: aggregate,
5: graupel, 6: columnar_planar_combination

snowflake_class_prob

float
Classification
probability

3D reconstruction / mass estimation

gan3d_mass

kg

float

Estimated mass

Leinonen et al, 2021

gan3d_volume

m^3

float

Estimated volume

Leinonen et al, 2021

gan3d_gyration

m

float

Estimated gyration rd

Leinonen et al, 2021

Co-located environmental information

env_T

deg C

float

Air temperature

env_P

hPa

float

Pressure

env_DD

deg

float
Wind direction

env_FF

m/s

float

Wind speed

env_RH

%

float

Relative humidity

Blowing snow estimation

bs_normalized_angle

float
Blowing Snow
normalized angle
Schaer et al 2020
Pure precip. if < 0.193, Pure BS if > 0.881

bs_mixing_ind

float
Blowing snow
mixing index
Schaer et al 2020
Only defined in mixed BS/precip environments

bs_precip_class_name

string
Blowing snow
class name
Schaer et al 2020
See bs_precip_class_id

bs_precip_class_id

int
Blowing snow
class ID
Schaer et al 2020,
0: undefined, 1: precip, 2: mixed,
3: blowing_snow

References#

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