CRX2RNX 
=======

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`CRX2RNX` is a command line tool to decompress Compact RINEX into `RINEX` data.  
It is an alternative to the existing official tool.

## Compression algorithm

*Yuki Hatanaka* created a simple yet efficient method to compress
RINEX files, it's called CRINEX,   
latest revision is `CRINEX3` and is specified 
[here](https://www.gsi.go.jp/ENGLISH/Bulletin55.html).

This tool supports both CRINEX1 and CRINEX3 (latest).

This tool supports a maximal compression order of 6, 
which is more than other existing tools: this means
you can safely pass CRINEX that were compressed with other 
existing tools.

## Getting started 

Build with the `--release` flag for best performances.

Specify one file to decompress with `--fp`:

```bash
crx2rnx --fp ../test_resources/CRNX/V1/wsra0010.21d
```

This generates `test_resources/CRNX/V1/wsra0010.21o`, 
to follow `RINEX` naming conventions.   

You can specify the output path yourself:
```bash
crx2rnx --fp ../test_resoures/CRNX/V1/wsra0010.21d \
    -o /tmp/output.rnx # does not have to follow naming conventions
```

```bash
crx2rnx -f ../test_resoures/CRNX/V3/ACOR00ESP_R_20213550000_01D_30S_MO.crx \
    -o /tmp/output.rnx # standard V3 extension
```