Viewing Connected Users

A common task for every SNIP operator is to check on who may be using your machine.  This information is provided in a simple report you can access from a button on the Clients and Caster tab.  This article describes the general topic area of managing your users.

The report which SNIP provides of your currently connected users has been enhanced in a few simple ways. These were requested by operators who allow multiple connections from the same account.

  • You will now see a list of all the current mountPts that any user account is connected to.
    This is of value to see what accounts are using your services the most.
  • You will also see the last NMEA-183 $GPGGA message the client has sent (if any).
    This is of value to some operators who wish to track their user’s locations.
  • The $GPGGA message is translated into LLH and the distance to the Base station is shown.

The textual report will still show how much data has been sent to each user and for how long it has been connected.  When operating in the autonomous mode (no user ID required) the report shows the IP:port used for the connection.

The report itself has been slightly restructured to present this information in a more readable way.  Here is an example of a report of connected users:

The following registered users (of 3 total users) are connected at this time:
   User: User1    with 4 connections. [ gisar30, RTCM3EPH, SCSC02, SCSC02 ]
   User: User2    with 4 connections. [ gisar30, RTCM3EPH, SCSC02, RTCM3EPH ]
   User: user    with 1 connections.  [ SCSC02 ]
There are 11 users in the Table of Registered Users.

There are currently 9 connections which are feeding data to these remote points:
    MountPt: RTCM3EPH : 55949  User2   Sent: 1.030 MB Over: 16:06.617 minutes
    MountPt: RTCM3EPH : 63193    User1   Sent: 1.459 MB Over: 22:48.490 minutes
    MountPt: RTCM3EPH : 59917    User2   Sent: 1.427 MB Over: 22:15.018 minutes
    MountPt: SCSC02 : 55948  User2   Sent: 314.01 KB Over: 16:06.620 minutes
    MountPt: SCSC02 : 63195    User1   Sent: 443.89 KB Over: 22:47.190 minutes
    MountPt: SCSC02 : 64017    user    Sent: 451.17 KB Over: 23:07.109 minutes
    MountPt: SCSC02 : 59915    User1   Sent: 433.51 KB Over: 22:15.019 minutes
    MountPt: gisar30 : 63180    User1   Sent: 674.29 KB Over: 22:58.981 minutes
            At location:   $GPGGA,195314.13,3407.6618442,N,11749.5264569,W,1,00,1.0,284.697,M,-33.512,M,0.0,*7B
    MountPt: gisar30 : 59916    User2   Sent: 650.98 KB Over: 22:15.018 minutes
Regarding the counts shown for data sent to a connection, keep in mind that any given user may have connected more than once.


Note that in the above connection from User1 originating from xx.xx.31.227, the NTRIP Client is periodically sending $GPGGA sentences, and the last sentence received is being displayed.


  • Use the “List Current Users…” button (found on the Caster and Clients tab) to see information about your current users.  This data is sorted by mountPt (streams) and the users which are connected to each.
    Useful to learn which mountPts and users access your SNIP node the most often.
  • Use the “List Recent IPs…” button (found on the Caster and Clients tab) to see information about what IPs have been used to access your system. This data is sorted by IP used and user account (if any) and provides data on the number and length of the connections.  The most frequent connections are then summarized, often these are NTRIP Clients who are experiencing connection issues.
    Useful to learn who attempts to access your SNIP node the most often.
  • Use the “List MountPts” tab (found on several tabs) to see information about your current data streams.
    Useful to learn the current connection state of all data streams offered by your SNIP node.

Further Hint:

You can also use SNIP‘s map graphical display style to see where any connected users are located.  This feature will plot the last $GPGGA sentence from all users and, if the display is left open, update these values as new NTRIP Client data is sent in (producing a breadcrumbs trace o the Rovers movements).  Those users who do not send $GPGGA sentences are plotted at zero/zero.

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