Mountpoints

Mountpoints are the correction streams that rovers connect to for RTK data. FastRTK supports multiple mountpoints for different formats, frequencies, and user groups.

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Overview

What is a Mountpoint?

A mountpoint is a named endpoint that broadcasts GNSS corrections. Rovers connect to a specific mountpoint to receive corrections in a particular format.

ntrip://user:pass@server:port/MOUNTPOINT_NAME
                              └─────────────────── Mountpoint

Mountpoint Types

Type	Source	Use Case
Local Source	Connected GNSS receiver	Primary corrections
Relay	External NTRIP caster	Backup, network integration
Push-In	Remote base pushing data	Distributed networks

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Creating Mountpoints

Add Local Source Mountpoint

For corrections from your connected GNSS receiver:

1. Navigate to Mountpoints → Add New
2. Select type: Local Source
3. Configure settings:

Setting	Description	Example
Name	Unique identifier (no spaces)	RTCM3
Format	Correction protocol	RTCM 3.2
Carrier	Signal frequencies	L1+L2
Nav Systems	GNSS constellations	GPS+GLO+GAL
Authentication	Require login	Basic

4. Click Save

Add Relay Mountpoint

To rebroadcast corrections from another NTRIP caster:

1. Navigate to Mountpoints → Add New
2. Select type: Relay
3. Configure connection:

Setting	Description
Remote Server	Source caster hostname/IP
Remote Port	Source caster port (usually 2101)
Remote Mountpoint	Source stream name
Username	Credentials for source
Password	Credentials for source

4. Configure local settings (name, auth)
5. Click Save

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Mountpoint Settings

Basic Settings

Setting	Options	Description
Name	Alphanumeric	Unique stream identifier
Enabled	On/Off	Stream active or paused
Authentication	None, Basic	Require login credentials

Format Settings

Setting	Options	Description
Format	RTCM 2.x, RTCM 3.x, CMR, CMR+	Correction protocol
Carrier	L1, L1+L2, L1+L2+L5	Signal frequencies
Solution	Single, Network	Positioning method

GNSS Settings

Setting	Description
GPS	Include GPS corrections
GLONASS	Include GLONASS corrections
Galileo	Include Galileo corrections
BeiDou	Include BeiDou corrections

Location Settings

Setting	Description
Latitude	Base station latitude
Longitude	Base station longitude
Country	ISO country code
Network	Network name (optional)

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Source Table

The NTRIP source table advertises available mountpoints to clients:

Viewing Source Table

Access at: http://your-server:2101/

Example output:

SOURCETABLE 200 OK
Server: FastRTK/1.0
Content-Type: text/plain

STR;RTCM3;RTCM3;RTCM 3.2;1005(30),...;2;GPS+GLO+GAL;SNIP;USA;37.77;-122.42;1;1;sNTRIP;none;B;N;0;
ENDSOURCETABLE

Source Table Fields

Field	Description
Mountpoint	Stream name
Identifier	Description
Format	RTCM version
Format Details	Message types and rates
Carrier	Signal type (0=L1, 1=L1+L2, 2=L1+L2+L5)
Nav System	Constellation codes
Network	Network name
Country	ISO code
Latitude	Base latitude
Longitude	Base longitude

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Managing Mountpoints

Enable/Disable

Temporarily stop broadcasting without deleting:

1. Go to Mountpoints
2. Toggle Enabled switch
3. Stream immediately stops/starts

Edit Settings

1. Click mountpoint name
2. Modify settings
3. Click Save
4. Active connections may need to reconnect

Delete Mountpoint

1. Click mountpoint name
2. Click Delete
3. Confirm deletion
4. All connected users are disconnected

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Monitoring

Mountpoint Status

Indicator	Meaning
Green	Active, streaming data
Yellow	Enabled but no data source
Red	Disabled or error

Statistics

Metric	Description
Connected Users	Current client count
Data Rate	Bytes per second
Uptime	Time since last restart
Total Sent	Cumulative data transmitted

Connected Clients

View who is connected to each mountpoint:

Information	Description
Username	Client account
IP Address	Client location
Connected	Session duration
Data Sent	Bytes to this client

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RTCM Message Configuration

Common Message Types

Message	Content	Typical Rate
1005	Station coordinates	30s
1006	Station + antenna height	30s
1077	GPS MSM7 observables	1s
1087	GLONASS MSM7 observables	1s
1097	Galileo MSM7 observables	1s
1127	BeiDou MSM7 observables	1s

Recommended Configurations

High-Bandwidth (Best Accuracy):

• All MSM7 messages at 1 Hz
• Position message every 10s
• ~2-3 KB/s per client

Low-Bandwidth (Data Savings):

• MSM4 messages at 1 Hz
• Position message every 30s
• ~0.5-1 KB/s per client

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Relay Configuration

Why Use Relays?

• Backup: Failover if local receiver fails
• Network Integration: Combine with state/regional CORS
• Coverage Extension: Fill gaps in your network

Setting Up a Relay

1. Obtain credentials for source caster
2. Create relay mountpoint
3. Configure connection settings
4. Test connectivity
5. Enable relay

Failover Configuration

Set up automatic failover between local and relay:

1. Create local mountpoint (primary)
2. Create relay mountpoint (backup)
3. Configure rover with both
4. Rover auto-switches on failure

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Best Practices

Naming Conventions

Style	Example	Use Case
Format-based	RTCM3, CMR	Single base, multiple formats
Location-based	SF_DOWNTOWN, HQ_ROOF	Multiple bases, same format
Project-based	PROJECT_A, SITE_42	Temporary/project streams

Security

• Always require authentication for public servers
• Use strong passwords for relay sources
• Limit mountpoint access by user
• Monitor for unauthorized access

Performance

• Limit RTCM messages to needed constellations
• Use MSM4 instead of MSM7 for bandwidth savings
• Monitor data rates for anomalies
• Regular connection testing

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Troubleshooting

"Mountpoint Not Found"

Cause	Solution
Typo in name	Verify exact spelling
Case sensitivity	Check uppercase/lowercase
Mountpoint disabled	Enable mountpoint
Source table cache	Wait or refresh client

"No Data"

Cause	Solution
Receiver disconnected	Check GNSS hardware
Relay source down	Verify remote caster
Network issue	Check connectivity

"Slow Updates"

Cause	Solution
High latency	Check network path
Overloaded server	Reduce client count
Bandwidth limit	Reduce RTCM messages

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