Technical notes about ARION project

Preamplifier

c

$E=mc^{2}$

DIFI server

The DIFI server has address 192.168.253.87 on the internal department network.

It's services are remotely accessible, through port forwarding, from 130.251.168.253 by ports:

Ext.port	Int.Port	Service
4080	80	apache
4081	5901	vnc
4082	22	ssh
4083	443	https
4084	1194	openvpn
4085	5901	vnc
4086	3306	mysql
4087	873	rsync
4088	8888	proxy
4089	8080	calibre

Tasks of the DIFI server

1. get analysis data from the on shore server
2. get slow control data from the remote server
3. transfer analysis data to the storage unit
4. transfer slow control data to the storage unit
5. transfer data to DIFI web server

Timing

Every action is done through crontab configuration

*/5 * * * * /home/arion/arion-update-analysis
25 14 * * * /home/arion/arion-update-slowcontrol

to look at the runnning configuration, from arion user:

crontab -l

to edit/update it:

crontab -e

Data stream path

Data acquired from hydrophones $H_{1}$ to $H_{4}$ on buoy $BU_{C}$ Carega or $BU_{S}$Sindaco are preamplified from PreAmplifier ${PA_{C}}_{1}$ to ${PA_{C}}_{4}$ and ${PA_{S}}_{1}$ to ${PA_{S}}_{4}$ the sampled from $Crio_{S}$ and $Crio_{C}$.

Digital data are sent from $Crio_{S}$ and $Crio_{C}$ to the Ground station throug the wifi bridge $Wifi_{S}$ and $Wifi_{C}$ from internal $IU$ and $EU$ and external townet wireless IP67 5Ghz units.