EUMETCast Terrestrial over AMT can serve any user hosted on the EUMETSAT side of the EWC, regardless of native multicast connectivity. The encapsulated data can travel via GEANT network or the commercial internet.
Pre-requisite
- You need to register to the EO Portal
- Subscribe to data for EUMETCast Terrestrial
- Request EUMETCast Terrestrial credentials for access from the EWC. You have to write to ops@eumetsat.int (Helpdesk) with you username from EO Portal.
Once you have the following parameters, you can proceed to the next steps.
| parameter | value or where to take it |
|---|---|
| username | from EO portal |
| userkey | provided by the helpdesk in the pilot phase. (opening a ticket and request EUMETCast Terrestrial credentials for access from the EWC |
Create security group
Once you enter your tenancy:
- Go to Infrastructure → Network
2. Go to Security Group tab and click the add button:
3. Assign eumetcast-ssh name to the security group and hit save:
In the scoped cloud select your tenancy from the list. If you leave All, the security group cannot be assigned to VMs.
4. Click on the new security group to access it
5. Click on the 'Add rule' button to create a new rule
6. Add the following rules and hit save
| Rule name | Direction | Rule Type | Protocol | Port Range | Source Type | Source | Destination Type |
|---|---|---|---|---|---|---|---|
| 2268-udp | ingress | Custom Rule | UDP | 2268 | Network | 0.0.0.0/0 | Instance |
| 22-ssh-tcp | ingress | Custom Rule | TCP | 22 | Network | 0.0.0.0/0 | Instance |
| 8500-tcp | ingress | Custom Rule | TCP | 8500 | Network | 0.0.0.0/0 | Instance |
Now you are ready to provision the client!
Provision the client VM
- Go to Provisioning → Instances and click 'Add' button
2. Use the search bar to find the 'EUMETCAST TERRESTRIAL ON AMT' (type eumetcast or terrestrial for example):
3. Select name for your VM:(e.g. eumetcast-client)
4. Use the following specifications for the provisioning of the client:
CPU | 8 cores |
RAM | 64 GB |
OS | Ubuntu v 22.04 |
Storage | 1.2TB |
EWC Plan | hm.xlarge |
security group | eumetcast-ssh |
Insert your credentials
5. Save and create the VM
Once the service is provisioned, the user will start to receive their subscribed data on their VM (stored by default in /root/data/eumetcast/ but can be changed in the /etc/cast-client-channels_ter-1.ini file).
A crontab is automatically activated in order to prevent the build-up of data on the machine
All data is deleted 5 mins after retrieval by default and this can be changed by the user. (See How to modify the time to live of the data to modify that)
6. Enable NAKs How to enable NAKs
7. Enable ACKs How to enable ACKs
User Notification Service
To access the User Notification Service (UNS), go to uns.eumetsat.int. You can find information on service alerts, scheduled maintenance and service enhancements. You can subscribe to UNS email notifications via the Earth Observation Portal. In addition, users can receive regular updates on scheduled maintenance and service enhancements through our EUMETSAT Users Twitter feed.
Advanced topics
- How to add an additional service
- How to change file storage path
- How to check file availability
- How to check the required bandwidth
- How to enable ACKs
- How to enable NAKs
- How to have real time logging
- How to modify the time to live of the data
- How to modify user subscription
- How to monitor and check connectivity of EUMETCast client
- How to sync EUMETCast data to object storage (S3)
- How to sync EUMETCast data to Shared File System (SFS)
- How to update the metricbeat monitoring of the EUMETCast Terrestrial station on EWC
Full documentation related to EUMETCast Terrestrial can be found here.