esahub: Downloading data from ESA scihub

esahub provides a simple interface for downloading satellite data from the European Sentinel missions.

It allows multiple downloads to be performed in parallel, from multiple data servers. The full range of Copernicus data servers are supported, including:

• https://scihub.copernicus.eu/dhus
• https://scihub.copernicus.eu/apihub
• https://scihub.copernicus.eu/s3 (guest access)
• https://s5phub.copernicus.eu/dhus (guest access)
• https://tmphub.copernicus.eu/dhus
• https://colhub.copernicus.eu/dhus
• https://colhub2.copernicus.eu/dhus

Setup

Install esahub:

$ pip install esahub

This will also create a YAML configuration file in ~/.esahub.conf (unless that file exists) by copying config.yaml. The configuration settings in ~/.esahub.conf have precedence over the settings in config.yaml.

You should overwrite the required settings in your ~/.esahub.conf, especially:

• GENERAL.DATA_DIR

For the majority of the data servers you will need to provide your own authentication details in SERVERS.

Testing the installation

The recommended way of running tests is:

$ python setup.py test

Note: Running the tests may take a while as it includes testing live downloads from SciHub (although with very small files).

Command Line Usage

$ esahub [cmd] [args] ...

Available commands:

Command	Description
ls	Queries SciHub for archives matching the specified query parameters. Prints the total number of files and data size.
get	Queries SciHub like ls, but then downloads the files.
doctor	Checks local satellite products for consistency, either by validating the zip/NetCDF format or by comparing to the MD5 checksum from SciHub. Allows to either delete or repair broken files.

Options

Option	Argument	Available for	Description
	<SAT>	all	Satellite to query, e.g. S1A, S1B, S2A, S2B, S3A
-d, --dir	<DIR>	all	raw data directory (defaults to config GENERAL.DATA_DIR)
-o, --out	<FILE>	ls	write files to JSON
-i, --in	<FILE>	get	read files from JSON
-m, --mission	<MISSION>	ls, get	e.g. Sentinel-1, Sentinel-2, Sentinel-3
-g, --geo	<WKT>	ls, get	geospatial location in WKT format
--location	<LOCATION>	ls, get	location as defined in config LOCATIONS
-t, --time	<ARG>	ls, get	Supports a variety of datetime string formats.
--type	<TYPE>	ls, get	e.g. GRD
--orbit	<ORBIT>	ls, get	ASC or DESC
--id	<ID>	ls, get	product identifier, may include wildcards (*), e.g. *SDV*
-q, --query	<QUERY>	ls, get	custom query for SciHub, e.g. for single archive: identifier:...
--restart		get	Force restart incomplete downloads
--log		all	write log file
--quiet		all	Suppress terminal output
--mode	<MODE>	doctor	zip|file
--delete		doctor	delete corrupt files
--repair		doctor	redownload corrupt files
--email		all	send email report

Datetime parsing

The following are examples of datetime formats that will be automatically parsed into a date or date range:

The following single dates will be explicitly converted to the date range covering the given year, month, or day:

• --time 2016
• --time 06/2018
• --time 2018/06
• --time "Sep 1, 2018"

Date ranges may also be specified explicitly:

• --time "2016 to 2017"
• --time "Jan 2016 - Feb 2016"
• --time "01/01/2016, 14/01/2016"

One-sided date ranges are also possible:

• --time "to 2017"
• --time "01/2017-"
• --time "01/12/2017,"

Examples

Ex 1. Retrieve the number of archives and total file size of Sentinel-3 archives uploaded to SciHub during the past midnight-to-midnight period intersecting Ireland (only works if Ireland is defined in the config item LOCATIONS):

$ esahub ls -t yesterday --location=Ireland

Ex 2. Download the archives uploaded yesterday for four locations.

$ esahub get -t yesterday --location=Ireland_Mace_Head --location=Namibia_Gobabeb --location=Italy_Rome_Tor_Vergata --location=France_La_Crau

Ex 3. Query SciHub for all available Sentinel-2 data for Ireland and write the result to a JSON file. Then read that JSON file by the get command, thus downloading the specified files. Note: Since the JSON file may be edited manually, this approach offers the most flexibility.

$ esahub ls --location=Ireland --mission=Sentinel-2 --out=Sen2_IE.json
$ esahub get --in=Sen2_IE.json --log

Ex 4. Check all zip archives in a custom directory for MD5 consistency and generate a log file.

$ esahub doctor --dir=/path/to/dir/ --mode=md5 --log

Python API

from esahub import scihub
query = {'mission': 'Sentinel-1',
         'geo': 'POINT(-9.0 53.0)',
         'time': 'today'}
files = scihub.search(query)
scihub.download(files)

Dependencies

Required

• pyyaml
• numpy
• lxml
• shapely
• python-dateutil
• pytz
• tqdm

Optional

• pyproj
• netCDF4

Libraries

• libgeos_c