pySatlantic

Python package to unpack binary messages from Satlantic instruments.

This module provides a simple way to unpack binary messages from Satlantic instruments (e.g. HTSRB, HyperNav, HyperPro, HyperSAS, and Suna). This is likely not the fastest implementation of the Satlantic protocol. However, it is easy to use and fast enough to process hyperspectral spectrum from multiple sensors (e.g. HyperSAS & Es) on single board computers in real-time.

Installation

The package runs with python 3 and can be installed from the setup file or directly with pip.

# Installation through setup file
python setup.py install

# Installation through pip
pip install pySatlantic

Convert binary files recorded with SatView to CSV

The module can be used to convert raw files recorded with SatView to CSV files.

python -m pySatlantic [-h] [-v] [--version] [-i] cal src

or directly from the installed module

python -m pySatlantic.__main__ [-h] [-v] [--version] [-i] cal src

positional arguments: cal Calibration file. src Raw file to decode and calibrate.

optional arguments: -h, --help show this help message and exit -v, --verbose Enable verbosity. --version Prints version information. -i, --immersed Apply immersion coefficients.

Integrate in other software

The class Instrument provides key methods to handle the binary frames from Satlantic instruments

• read_calibration_file/read_calibration_dir/read_sip_file: Parse calibration file(s) needed to unpack and calibrate binary frames.
• find_frame: Find known frame in a binary array
• parse_frame: Unpack binary frame and apply calibration fit to convert data in scientific units

The class Instrument support the immersed flag for each sensor independently. The immersion flag is accessible through Instrument.cal[<frame_header>].immersed with frame_header being the sensor to be immersed or not.

The class BinReader helps to separate individual frames looking for the registration bytes b'SAT'. An example of usage of that class is SatViewRawToCSV which converts a raw file recorded with SatView into a CSV file.

Sensors Tested

List of frames and associated calibration files tested:

• Es:
  • HED
  • HSE
• HyperSAS
  • HLD
  • HSL
• pySAS Tower
  • UMTWR
• HTSRB
  • HSD
  • HST
  • THS
• HyperPro
  • HPE
  • HPL
  • MPR
  • PED
  • PLD
  • SATBB2F
  • SATFLCD
• HyperNAV
  • SATXDZ
  • SATXLZ
  • SATXCZ
  • SATYCZ
• OCR-504
  • SATDI4
• NMEA
  • $GPRMC

Some functionalities of the Satlantic protocol are not implemented. Use GitHub Issues for feature requests.