Important: Switch to HTTPS for GNSS Data Downloads

⚠️ FTP Server Shutdown Notice: The FTP server (ftp://gnss-data.kadaster.nl) will be permanently shut down on October 1, 2025. Please migrate your scripts and processes to use HTTPS before this date.

Please switch to downloading and mirroring data from https://gnss-data.kadaster.nl

Why the Change?

Download Examples

The following examples show how to download GNSS data files using various tools. These examples use real paths from the NSGI GNSS Datacenter.

Using curl

Download a Single File

# Download GNSS observation file with original filename (EIJS station, day 232, 2025)
curl -O https://gnss-data.kadaster.nl/data/daily/2025/232/EIJS00NLD_R_20252320000_01D_30S_MO.crx.gz

# Download with an alternative name
curl -o eijs2320.25d.gz https://gnss-data.kadaster.nl/data/daily/2025/232/EIJS00NLD_R_20252320000_01D_30S_MO.crx.gz

Download Multiple Files

# Download multiple station files using curl's brace expansion
curl -O "https://gnss-data.kadaster.nl/data/daily/2025/232/{AMEL,EIJS,VLIS}00NLD_R_20252320000_01D_30S_MO.crx.gz"

# Download files from multiple stations individually
curl -O https://gnss-data.kadaster.nl/data/daily/2025/232/AMEL00NLD_R_20252320000_01D_30S_MO.crx.gz \
     -O https://gnss-data.kadaster.nl/data/daily/2025/232/EIJS00NLD_R_20252320000_01D_30S_MO.crx.gz \
     -O https://gnss-data.kadaster.nl/data/daily/2025/232/VLIS00NLD_R_20252320000_01D_30S_MO.crx.gz

Download Multiple Files with more complex pattern

# This downloads UTR2 station data for hours 00-13, at 15-minute intervals (00, 15, 30, 45 minutes)
curl -O "https://gnss-data.kadaster.nl/data/highrate/2025/193/UTR200NLD_R_2025193[00-13]{00,15,30,45}_15M_01S_MO.crx.gz"

Using lftp

Mirror a Directory

# Mirror entire directory of daily data for day 232, 2025
lftp -c "open https://gnss-data.kadaster.nl; mirror /data/daily/2025/232 /local/gnss/2025/232"

# Mirror specific stations from entire year with file filtering
lftp -c "open https://gnss-data.kadaster.nl; mirror -p -v -I EIJS*.crx.gz -I SDYK*.crx.gz /data/daily/2025 /local/gnss/2025"

# Mirror with parallel downloads and retry settings
lftp -c "open https://gnss-data.kadaster.nl; set net:max-retries 2; set cmd:parallel 4; mirror /data/daily/2025/232 /local/gnss/2025/232"

Download Multiple Files

# Download all compressed RINEX files from a specific day
lftp -c "open https://gnss-data.kadaster.nl; mget /data/daily/2025/232/*.crx.gz"

# Download files from specific stations only
lftp -c "open https://gnss-data.kadaster.nl/data/daily/2025/232; mget EIJS00NLD_R_20252320000_01D_30S_MO.crx.gz AMEL00NLD_R_20252320000_01D_30S_MO.crx.gz"

Using Python

Download Single File

import requests

url = "https://gnss-data.kadaster.nl/data/daily/2025/232/EIJS00NLD_R_20252320000_01D_30S_MO.crx.gz"
response = requests.get(url)

if response.status_code == 200:
    with open("EIJS00NLD_R_20252320000_01D_30S_MO.crx.gz", "wb") as f:
        f.write(response.content)
    print("File downloaded successfully")
else:
    print(f"Download failed: {response.status_code}")

Download Multiple Files

import datetime
import requests

date = datetime.date(2025, 4, 19)

Y, j = date.strftime("%Y %j").split()

base_url = f"https://gnss-data.kadaster.nl/data/daily/{Y}/{j}/"
stations = ["AMEL00NLD", "EIJS00NLD", "SABY00BES"]

for station in stations:
    filename = f"{station}_R_{Y}{j}0000_01D_30S_MO.crx.gz"
    url = base_url + filename
    response = requests.get(url)
    
    if response.status_code == 200:
        with open(filename, "wb") as f:
            f.write(response.content)
        print(f"Downloaded: {filename}")
    else:
        print(f"Failed to download: {filename}")

Using Perl

Download Single File

use LWP::Simple;

my $url = "https://gnss-data.kadaster.nl/data/daily/2025/232/EIJS00NLD_R_20252320000_01D_30S_MO.crx.gz";
my $filename = "EIJS00NLD_R_20252320000_01D_30S_MO.crx.gz";

if (getstore($url, $filename) == 200) {
    print "File downloaded successfully\n";
} else {
    print "Download failed\n";
}

Download Multiple Files

use LWP::UserAgent;

my $ua = LWP::UserAgent->new();
my $base_url = "https://gnss-data.kadaster.nl/data/daily/2025/232/";
my @stations = ("APEL00NLD", "BONK00BES", "ZWO200NLD");

foreach my $station (@stations) {
    my $filename = "${station}_R_20252320000_01D_30S_MO.crx.gz";
    my $url = $base_url . $filename;
    my $response = $ua->get($url, ':content_file' => $filename);
    
    if ($response->is_success) {
        print "Downloaded: $filename\n";
    } else {
        print "Failed to download: $filename\n";
    }
}

Migration Tips