How to unlock: Finish Meet the Resistance quest [Voeld: Resistance Base].
Here you can find the guide for Eyes on the Ground quest. In default this quest is treated as a Priority Op (main storyline quest) in Mass Effect: Andromeda game. However, if you decided to do the quest on Havarl first (Helping Havarl's Scientists) then this quest is moved to "Heleus Assignments" tab in your journal. Because of that it becomes a side quest but you can still take it and complete it in the same way as when it would be a main quest.
In this quest you must visit Hjara research station on planet Voeld. This allows you to learn more about the Angara that were kidnapped by Kett. After that you can go and save them (this is the part of another quest).
Go to Hjara
Go to the forward station and call for Nomad. Additionally, you can get familiar with SAM's report about this planet and its main "attractions". After getting into Nomad you can follow the yellow path (on your way there you can help the Angara who fight against a group of the Remnant) or go down the steep mountain (you don't have to worry about suddenly destroying the machine). Hjara research base is near the starting point, east from it, in the center of the planet.
Speak with Skeot
After reaching your destination leave the machine and find Skeot. From him you can learn more about the kidnapped group of Angara and you can confirm your willingness to save them. You receive the data with the location of the camp in which they are kept.
Warning - In Hjara you can unlock at least one side quest and find valuable supplies.
Rewards for finishing the quest: XP, Andromeda Viability Points, Stage a Rescue quest unlocked.