PHP code example of harmonicdigital / ccsds

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

harmonicdigital / ccsds example snippets

use HarmonicDigital\Ccsds\CcsdsClient;
use League\Flysystem\Filesystem;
use League\Flysystem\Local\LocalFilesystemAdapter;

$filesystem = new Filesystem(new LocalFilesystemAdapter('/path/to/data'));
$client = new CcsdsClient($filesystem);

$oemFile = $client->parseOemFile('ephemeris/H20090909_0001.LOE');

// File-level header
echo $oemFile->header->version;      // e.g. "1.0"
echo $oemFile->header->originator;   // e.g. "ESOC"
echo $oemFile->header->creationDate->format('Y-m-d\TH:i:s');

// File-level comments
foreach ($oemFile->comments as $comment) {
    echo $comment . PHP_EOL;
}

// Segments - each covers a contiguous time range
foreach ($oemFile as $segment) {
    $meta = $segment->metadata;

    echo $meta->objectName;          // e.g. "HERSCHEL"
    echo $meta->objectId;            // e.g. "2009-026A"
    echo $meta->refFrame;            // e.g. "EME2000"
    echo $meta->timeSystem;          // e.g. "TDB"
    echo $meta->startTime->format('Y-m-d\TH:i:s.u');
    echo $meta->stopTime->format('Y-m-d\TH:i:s.u');

    // State vectors - position in km, velocity in km/s
    foreach ($segment->stateVectors as $sv) {
        echo $sv->epoch->format('Y-m-d\TH:i:s.u');
        echo "  x={$sv->x}  y={$sv->y}  z={$sv->z}";
        echo "  xDot={$sv->xDot}  yDot={$sv->yDot}  zDot={$sv->zDot}";
        echo PHP_EOL;
    }
}

// Safe to iterate multiple times at no extra I/O cost
$segments = iterator_to_array($oemFile);
$same     = iterator_to_array($oemFile); // served from cache

use HarmonicDigital\Ccsds\Exception\ParseException;
use League\Flysystem\UnableToReadFile;

try {
    $oemFile = $client->parseOemFile('missing_or_corrupt.oem');
    foreach ($oemFile as $segment) { /* ... */ }
} catch (UnableToReadFile $e) {
    // Flysystem could not open the file
} catch (ParseException $e) {
    // The file content does not conform to the OEM format
}

use HarmonicDigital\Ccsds\CcsdsClient;
use HarmonicDigital\Ccsds\Parser\OemParserInterface;

$client = new CcsdsClient($filesystem, new MyCustomOemParser());