TEMPO gridded HCHO vertical columns V03

AI-generated Key Takeaways

The Formaldehyde Level 3 collection provides trace gas information on a regular grid derived from TEMPO observations.
This dataset includes information on formaldehyde vertical columns, ancillary data for calculations, and retrieval quality flags.
A version with QA filters is available, and general documentation is provided.
The dataset includes various bands measuring different parameters related to formaldehyde and atmospheric conditions.
This dataset is in the public domain and available without restriction on use and distribution.

Dataset Availability: 2023-08-01T00:00:00Z–2025-09-16T21:03:09Z
Dataset Provider: NASA ASDC

Tags: air-quality formaldehyde nasa pollution satellite-imagery tropomi

Description

Formaldehyde Level 3 collection provides trace gas information on a regular grid covering the TEMPO field of regard for nominal TEMPO observations. Level 3 files are derived by combining information from all Level 2 files constituting a TEMPO East-West scan cycle. The rasters contain information on formaldehyde vertical columns, ancillary data used in air mass factor calculations and reference sector or de-striping corrections, and retrieval quality flags. The re-gridding algorithm uses an area-weighted approach.

A version of this dataset with QA filters applied is available as NASA/TEMPO/HCHO_L3_QA
General Documentation

Bands

Pixel Size 2226 meters

Bands

Name	Units	Pixel Size	Description
`weight`	km^2	meters	Sum of Level 2 pixel overlap areas. Represents the weighting factor for each grid cell, indicating the fraction of the grid cell area with valid data.
`vertical_column`	molecules/cm^2	meters	HCHO vertical column
`vertical_column_uncertainty`	molecules/cm^2	meters	HCHO vertical column uncertainty
`main_data_quality_flag`	Dimensionless	meters	Main data quality flag. Provides an overall assessment of the data quality
`num_vertical_column_samples`	Dimensionless	meters	Number of vertical column samples
`min_vertical_column_sample`	molecules/cm^2	meters	Smallest vertical column sample
`max_vertical_column_sample`	molecules/cm^2	meters	Largest vertical column sample
`solar_zenith_angle`	deg	meters	Solar zenith angle at pixel center
`viewing_zenith_angle`	deg	meters	Viewing zenith angle at pixel center
`relative_azimuth_angle`	deg	meters	Relative azimuth angle at pixel center
`surface_pressure`	hPa	meters	Surface pressure
`terrain_height`	m	meters	Terrain height
`snow_ice_fraction`	Dimensionless	meters	Fraction of pixel area covered by snow and/or ice
`fitted_slant_column`	molecules/cm^2	meters	HCHO fitted slant column
`fitted_slant_column_uncertainty`	molecules/cm^2	meters	HCHO fitted slant column uncertainty
`albedo`	Dimensionless	meters	Surface albedo
`amf`	Dimensionless	meters	HCHO air mass factor
`eff_cloud_fraction`	Dimensionless	meters	Effective cloud fraction
`amf_cloud_fraction`	Dimensionless	meters	Cloud radiance fraction for AMF calculation
`amf_cloud_pressure`	hPa	meters	Cloud pressure for AMF calculation

main_data_quality_flag Class Table

Value	Color	Description
0	None	good
1	None	suspect
2	None	bad

Terms of Use

Terms of Use

This dataset is in the public domain and is available without restriction on use and distribution. See NASA's Earth Science Data & Information Policy for additional information.

Citations

NASA/LARC/SD/ASDC. (n.d.). TEMPO gridded HCHO vertical columns V03 (PROVISIONAL) [Data set]. NASA Langley Atmospheric Science Data Center DAAC. Retrieved from https://doi.org/10.5067/IS-40e/TEMPO/HCHO_L3.003

DOIs

https://doi.org/10.5067/IS-40e/TEMPO/HCHO_L3.003

Explore with Earth Engine

Code Editor (JavaScript)

 var 
  
 collection 
  
 = 
  
 ee 
 . 
 ImageCollection 
 ( 
 'NASA/TEMPO/HCHO_L3' 
 ) 
  
 . 
 filterDate 
 ( 
 '2024-04-01' 
 , 
  
 '2024-04-05' 
 ) 
 var 
  
 visParams 
  
 = 
  
 { 
  
 min 
 : 
  
 0 
 , 
  
 max 
 : 
  
 1.5e16 
 , 
  
 bands 
 : 
  
 [ 
 'vertical_column' 
 ], 
  
 palette 
 : 
  
 [ 
  
 '000080' 
 , 
  
 '0000D9' 
 , 
  
 '4000FF' 
 , 
  
 '8000FF' 
 , 
  
 '0080FF' 
 , 
  
 '00D9FF' 
 , 
  
 '80FFFF' 
 , 
  
 'FF8080' 
 , 
  
 'D90000' 
 , 
  
 '800000' 
  
 ] 
 }; 
 Map 
 . 
 setCenter 
 ( 
 - 
 95.06 
 , 
  
 42.02 
 , 
  
 3 
 ) 
 Map 
 . 
 addLayer 
 ( 
 collection 
 , 
  
 visParams 
 , 
  
 'HCHO vertical column' 
 )

Open in Code Editor

TEMPO gridded HCHO vertical columns V03

NASA/TEMPO/HCHO_L3, air-quality,formaldehyde,nasa,pollution,satellite-imagery,tropomi

2023-08-01T00:00:00Z/2025-09-16T21:03:09Z

-90 -180 90 180

Google Earth Engine

https://developers.google.com/earth-engine/datasets

TEMPO gridded HCHO vertical columns V03 Stay organized with collections Save and categorize content based on your preferences.

AI-generated Key Takeaways

Description

Bands

Terms of Use

Citations

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

TEMPO gridded HCHO vertical columns V03