Hive Radar - https://www.hiveradar.com/

Wi-Fi Survey Kit - https://wifisurveykit.com/

Nick Turner's Blog - https://www.nickjvturner.com/blog/2016/11/08/how-to-modify-manfrotto-ranker-stand-for-apos & https://www.nickjvturner.com/blog/2016/10/20/apos-survey-tripods-a-brief-history

Vantage Tripods - https://vantagepointproducts.com/collections/tall-wifi-apos-site-survey-tripod-masts-12ft-to-40ft-4m-to-12m/products/6m-9m-12m-tall-mast-tripod-for-apos-warehouse-wifi-site-survey?variant=32210553634931