Bangle GPS Power management

Apologies for posting again. My original post was in New Projects which I realise was the wrong place.

I have question around power management options for the GPS and how to minimise power consumption over frequency of updates.

In GPS-comms.js on github I can see:

function UBX_CFG_PMS() {
// UBX-CFG-PMS - enable power management - Super-E
writeGPScmd([0x06,0x86, // msg class + type

     8,0,//length
     0x00,0x03/*1hz*/, 0,0, 0,0, 0,0]);  
}

Could someone explain what the parameters mean ?

How could I set the GPS to only look for an update every 120 seconds ?

Thanks
Hugh