## 6 Discussion  
In recent years, the development of IoT satellites has burgeoned. For example, the U.S. company SpaceX is deploying a low-orbit broadband IoT constellation, i.e., Starlink, and Swarm is developing a low-orbit narrowband constellation. China has also proposed a broadband satellite constellation, namely, the Hongyun project, which has not yet been implemented, in addition to the low-orbit narrowband constellation of the Xingyun project. In this article, we proposed a new satellite-enabled IoRT network benefitting from the Xingyun project, China's first IoT satellite constellation, to address the challenge of retrieving monitoring data from the most remote areas of the TP lacking public networks, which could provide tremendous significance for scientific research. We implemented the proposed satellite-enabled IoRT architecture and demonstrated its application in delivering monitoring data to a data center via satellites. The innovative design implemented a newly developed ground IoT terminal allowing monitoring devices to be networked, which could be deployed in any region of interest. Because monitoring requirements are usually dynamic in terms of time and space, especially across the TP, the innovative ground IoT terminal could facilitate the flexible deployment of monitoring devices at different locations within the satellite-enabled IoRT network. Each device could transmit monitoring data to a data center, thus offering timely and effective data retrieval options to researchers. The key aspect of the ground IoT terminal entails the integration of a LEOBIT satellite transceiver and an RR1016 datalogger. At present, the downlink transmission rate of the transceiver reaches only 2.4 kbps, and the uplink transmission rate ranges from 1.2 to 2.4, 4.8 and 9.6 kbps. Nevertheless, the terminal could satisfy the requirements of routine data transmission. Although data packet loss occurred, this phenomenon could be significantly mitigated as more Xingyun satellites are launched and integrated into the constellation. The implementation of the proposed satellite-enabled IoRT network based on the Xingyun project could trigger the large-scale deployment of automatic ground-based observation stations, heralding a new beginning for observations across the TP. Accordingly, the value of the satellite-enabled IoRT network for data retrieval from the most remote areas of the TP is very clear, as global access could enable rapid data retrieval from remote monitoring devices and could help users in a new era of environmental monitoring. However, the transmission of data generated in high-frequency observations, such as eddy covariance and video data, still requires a broadband IoT constellation. Given that the Chinese broadband satellite constellation (i.e., the Hongyun project) has not yet been launched and that the Starlink service has not yet been introduced into the \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Test Time**} & \multirow{2}{*}{**Weather**} & \multirow{2}{*}{**Data Size**} & \multicolumn{2}{c}{**Number of**} & \multirow{2}{*}{**Received**} & **Is the Satellite** \\  & & & **Transmitted** & & **Panctioning** \\  & & & **Packets** & & **Properly?** \\ \hline
2020.12.13 7:22 & Overcast & 400 B & 250 & 238 & Yes \\
2020.12.13 8:21 & Overcast & 400 B & 460 & 445 & Yes \\
2020.12.13 19:03 & Overcast & 400 B & 374 & 355 & Yes \\
2020.12.13 19:40 & Overcast & 400 B & 552 & 520 & Yes \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Throughput (with the packet creation mode). Chinese market, the development of a virtual IoT constellation through the integration of a satellite communication channel could represent an alternative solution to broaden the communication bandwidth. Consequently, we are attempting to make this objective a reality.