1. A method of determining sensor detection probabilities of a system of platforms each having one or more respective sensors, the method comprising: determining a detection-parameters set of one or more combinations of platforms and respective sensors of the system of platforms based on a target object, environmental conditions affecting detection of the target object during a first point in time of a timeline of the target object, and sensing-and-positioning capabilities of each of the one or more combinations; deriving a time limit to detect the target object, the time limit being at a second point in time after the first point in time, and based on a threat level of the target object; updating the detection-parameters set based on the second point in time; deriving a time-to-process a detection of the target object by each of the one or more combinations; deriving an accuracy of each of the one or more combinations based on the target object, environmental conditions affecting detection of the target object during the first point in time, and the sensing-and-positioning capabilities of each of the one or more combinations; determining sensor detection probabilities of each sensor of the one or more combinations based on the second point in time, the time-to-process the detection of the target object, and the accuracy of each of the one or more combinations, wherein the sensor detection probabilities are below a probability threshold when the time-to-process the detection of the target object exceeds the time limit to detect the target object; and relocating the one or more combinations or one or more additional combinations of platforms and respective sensors to a region based on the sensor detection probabilities such that either the one or more additional combinations are relocated to the region to detect the target object; at least one of the one or more combinations are relocated to the region to detect the target object; or a plurality of the one or more combinations is relocated from a low threat level area to the region based on physical conditions including weather, temperature, time, and/or environment; whereby relocating the one or more combinations or the one or more additional combinations results in a most effective combination of the one or more combinations and/or the one or more additional combinations to monitor the target object or multiple other target objects across various locations and time based on the sensor detection probabilities.