The proposed gate activity monitoring tool suite can be used in the following NASA applications: - The gate monitoring tool suite directly caters to objectives of the Networked ATM sub-project under the SMART NAS project. It increase gate operations predictability and reduce total cost of National Airspace System operations. - Development of TBO concepts and enabling technology solutions that leverage revolutionary capabilities and that enable capacity, throughput, and efficiency gains within the various phases of gate-to-gate operations. - The proposed suite of tools can enable autonomy/autonomous technologies and concepts for trajectory management and efficient/safe traffic flows. Low cost airport activity monitoring techniques are of considerable interest to FAA and airports in general. Moreover, computer vision based activity monitoring techniques are of significant interest in several areas such as warehouses, commercial office buildings, train stations, and bus stations.