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Specifically, a low\u2010altitude small UAV needs to characterize the propagation mechanisms from ground reflection. In this paper, the empirical path loss channel characterizations of A2A ground reflection CM based on different scenarios were presented by comparing the wireless communication modules for UAVs. Two types of wireless communication modules both WiFi 2.4\u2009GHz and LoRa 868\u2009MHz frequency were deployed to study the path loss channel characterization between Tx\u2010UAV and Rx\u2010UAV. To investigate the path loss, three types of experimental channel models, such as CM1 grass floor, CM2 soil floor, and CM3 rubber floor, were considered under the ground reflection condition. The analytical A2A Two\u2010Ray (A2AT\u2010R) model and the modified Log\u2010Distance model were simulated to compare the correlation with the measurement data. The measurement results in the CM3 rubber floor scenario showed the impact from the ground reflection at 1\u2009m to 3\u2009m Rx\u2010UAV altitudes both 2.4\u2009GHz and 868\u2009MHz which was converged to the A2AT\u2010R model and related to the modified Log\u2010Distance model above 3\u2009m. It clear that there is no ground reflection effect from the CM1 grass floor and CM2 soil floor. This work showed that the analytical A2AT\u2010R model and the modified Log\u2010Distance model can deploy to model the path loss of A2A\u2010CM by using WiFi and LoRa wireless modules.<\/jats:p>","DOI":"10.1155\/2021\/5589487","type":"journal-article","created":{"date-parts":[[2021,8,2]],"date-time":"2021-08-02T16:20:41Z","timestamp":1627921241000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Empirical Path Loss Channel Characterization Based on Air\u2010to\u2010Air Ground Reflection Channel Modeling for UAV\u2010Enabled Wireless Communications"],"prefix":"10.1155","volume":"2021","author":[{"given":"Jatuporn","family":"Supramongkonset","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9575-0941","authenticated-orcid":false,"given":"Sarun","family":"Duangsuwan","sequence":"additional","affiliation":[]},{"given":"Myo Myint","family":"Maw","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9315-3449","authenticated-orcid":false,"given":"Sathaporn","family":"Promwong","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2021,8,2]]},"reference":[{"key":"e_1_2_9_1_2","doi-asserted-by":"crossref","unstructured":"SruthyS.andGeorgeS. 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