Here is my 100% Achievement guide for Deliver Us The Moon!
In chapter 1, there are 4 big items you need to scan for this achievement.
The MPT Network dish which is found directly outside in the very beginning when you leave the building.
The Sputnik Monument is found basically straight ahead after the MPT Network Dish just past some caravans on the left.
When you go up the lift, into the building, finding the code and going through. You enter an office (The same one with the Globe you have to spin for a separate achievement). Opposite the globe is a whiteboard to Scan.
The last one is after you move the set of stairs to go through a door, to the left and up some more stairs into the canteen, opposite end on the right is the audio log and that unlocks this achievement.
Be aware though, there are more collectibles than just those 4 to collect to get the 100% and all collectibles found, and i have put them all for chapter 1 at least in a timestamp below.
Hope This Helps!
Chapter 1 (Fesenkov Cosmodrone) Start - 1:50
COLLECTIBLE Moonman Comic Book 1 - 2:10
SCAN - The Mission 1/4 (MPT network dish) - 4:25
SCAN - The Johanson Family 1/6 (A Mother Lost) - 5:15
SCAN - The Mission 2/4 (Sputnik Monument) - 5:30
SCAN - The Mission 3/4 (Fortuna) - 9:10
SCAN - The Malfunction 1/4 (Maria's Broken ASE Unit) - 9:25
AUDIO - The Mission 4/4 (Last Minute Check Up) - 11:00
SCAN - The Johanson Family 2/6 (Claire's Rocket Model) - 11:15