The purpose of the loitering drone is autonomous. If you need a human in the loop, the datalink would be constrained by the radar horizon and the low flight of the drone itself. The operator would have to be on an aircraft or require a drone to relay the datalink. A relay drone isn't something I would expect of an Orlan 10.
The observing drone is likely the target spotter, which tells the station to send the second and attacking drone to this coordinates. The observation drone and the attacking drones camera will only be used for target kill confirmation. It's not likely you will need PC level chipsets. Point and shoot cameras are capable of face ID.
"A relay drone isn't something I would expect of an Orlan 10"
But a relay drone is exactly what an Orlan 10 is capable of and sold as a package of (due to it's swappable mission modules).
"If you need a human in the loop, the datalink would be constrained by the radar horizon and the low flight of the drone itself.
*snip*
The observing drone is likely the target spotter, which tells the station to send the second and attacking drone to this coordinates"
An attack/suicide drone (eg. Switchblade, Lancet, et al) doesn't fly fast - about 110 - 150kmph. Sending an attack drone 10km to prosecute a target of opportunity already incurs a time lag of 4~6minutes (ToF) during which a vehicular target can easily displace a few km.
If you are sending targeting info to the attack drone while it is already in the air to adjust that, then it implies you pretty much already have the ability to have man-in-the-loop operation of the attack drone anyway.
Flying low and slow with man-in-the-loop is what exactly makes these attack drones
cheap and able to be used in numbers rather than only for targets of value. The tech for a man-in-the loop drone is essentially the same as that for any basic drone - secure datalink. An autonomous attack drone capable of searching a grid for the displaced target will involve more complicated electronics that will add significantly to it's per unit cost.
In this day and age, LOS and radar horizon is hardly a limiting factor for large tactical UAVs. As the Orlan 10 demonstrates, a simple relay drone within the family can greatly extend your reach out to a strategic depth.
There is a time and place for autonomous munitions.
There is also a time and place for non-autonomous munitions.
Why limit yourself to one when you can have both?