It will orbit the Red Planet for at least one Martian year using three scientific instruments to monitor the Martian atmosphere.
The launch had been delayed on two occasions due to bad weather in Japan - n 15 July at 2.21 am IST and on Friday, 17 July at 2.13 am IST.
Despite being the third-richest country in the world, the UAE’s scientific and engineering community is still small.
UAE's Hope probe to Mars launch further delayed due to bad weather in Japan; will attempt to launch between 20-22 July
The weather delaying launch isn't expected to be severe or lasting, according to the ops team, which is confident of making the current launch window.