The groundstation Pi will always have a ethernet connection to the network that you are using it on. It creates a wireless network that the satellite pi can connect to.

If the groundstation Pi is connected to the internet, the satellite pi can access the internet via the groundstation.

SETUP WIRELESS LOCALE IN raspi-config PRIOR

On GS

First, find available wireless interfaces on the GS Pi with

nmcli device

Create default hotspot config:

sudo nmcli device wifi hotspot ssid SSC-JUK-GS password jovianuk123 ifname wlan0

Find uuid from:

nmcli connection

Update config:

sudo nmcli connection modify <hotspot UUID> connection.autoconnect yes connection.autoconnect-priority 100

Lastly open /etc/sysctl.conf and add or uncomment:

net.ipv4.ip_forward=1

On SAT