# Evaluation of IEEE802.15.4g for Environmental Observations
)1 Inria, EVA Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.W. )1 Inria, EVA Team Team, 75012 Paris, France; [EMAIL_ADDRESS] (T.C. ); [EMAIL_ADDRESS] (T.Wenvironments such as mines and sewers. Both studies conclude that in those environments the radio waves propagate as inside a waveguide. The smaller the cross-section area of the structure, more attenuation happens for lower frequencies (sub-GHz) than for higher frequencies (2.4 and 5.8 GHz). [PERSON] et al. (2018) proposed a propagation model for low-power wireless networks in the 868 MHz band, for ground to ground and ground to air communications. The model is validated through experiments. The authors show the decay of the receiver power when the Fresnel radius is obstructed. [PERSON] et al. (2018) present an extensive set of measurements taken in a potato field of 154 m \(\times\) 105 m in order to study how the environmental conditions affects the performance of the radio communications. For their experiment they used 13 Mica2 Dot nodes with a Chipcon CC1000 radio chip in the 433 MHz band, working with a Frequency Shift Keying (FSK) modulation, 19.2 kbps and +10 dBm TX power. Nodes are placed on the ground and the antennas are at a height of 11 cm. Meanwhile one node transmitted, the rest of the nodes listen and stored the amount of received packets and their Received Strength Signal Indicator (RSSI) value. It is perceived that radio waves propagated better with conditions of high humidity, e.g., during rain and at nights. They concluded that for reliable communication (RSSI \(\geq-\)90 dBm), nodes need to be separated for at most 10 m for during blooming (potato plants grow up to 1 m approximately) and 23 m when the crop is on its return. [PERSON] et al. (2018) described FireWxNet: a hybrid wireless system to monitor weather conditions. This system allows the fire fighters to measure fire and weather conditions in order to predict fire behavior and reduced the damages caused by these events. Two sensor networks were deployed in the Bitterroot National Forest. The nodes used are based on the Mica2 platform featuring a Chipcon CC1000 radio operating at 900 MHz, with a maximum TX power of +10 dBm. Nodes were mounted on a tripod at 1.5 m from the ground and are located on the surface of the Hell's Half Acre and Kit Carson mountains, at different heights. Stable radio links up to 400 m are formed. [PERSON] (2018) described the design considerations of a low cost WSN for wildfire monitoring.