Lizard Island Sensor Relay Pole 2 (RP2)

A 6m galvanized pole has been deployed in the eastern part of the lagoon in behind Seabird Islet. The Relay Pole has three functions. The first is to propagate the wireless network through which the buoys talk and so it forms part of the network backbone talking directly to Relay-Pole 1. The second function is that a vaisala WXT520 weather station is mounted on the top and so this pole provides above water met observations. These include air temperature, humidity, air pressure, wind speed and direction and rainfall.The third function is that a sensor string is attached to the pole, the sensor string runs through a channel in Seabird Islet across the exposed seaward reef flat to the reef crest and then down the reef slope to around 20m. This gives a profile down the reef slope and gives readings of the water coming onto the reef complex.The pole has two Campbell Scientific loggers (one for the weather station, one for the sensors), spread-spectrum radio and 2.4/5 GHz 802.11 wireless for communicating with the base station (located at the workshop near the Research Station). The sensor string as of August 2010 has a SeaBird SBE37 at the end of the sensor string (around 230m out from the pole), and two SeaBird SBE39's located at teh reef crest and down at the start of the reef slope.The unit will be serviced every six months and will be used in the future for attaching new sets of sensors.
The Pole is part of a larger deployment at Lizard Island consisting of four buoys and two relay-poles being deployed as part of the GBROOS Project. The design looks to measure the water within the lagoon as well as water impinging onto the reef and potentially any upwelling or movement of warm water that may cause thermal stress such as coral bleaching. The Relay Pole serves to form the network backbone using 2.4/5 GHz 802.11 wireless and Campbell 900 MHz spread spectrum radio's to communicate. The pole talks directly to RP1 on Plafrey Island which in urn talks to the base station at the research station. The pole also talks to buoys in its immediate range.The pole also houses a Vaisala WXT520 weather station and has an inductive modem / coupler that attaches inductive instruments to the pole. The inductive cable / sensor string runs east around Seabird Islet across the reef flat, down the reef crest into the reef front to around 20m.

在海鸟岛后方的泻湖东部区域，部署了一根长6米的镀锌杆。该中继杆（Relay Pole）具备三项功能。其一，该杆可传播无线网络，供浮标之间进行通信，并作为网络骨干的一部分，直接与中继杆1（Relay-Pole 1）对接。其二，杆顶搭载有维萨拉WXT520气象站（Vaisala WXT520），可提供水面以上气象观测数据，涵盖气温、湿度、气压、风速风向以及降雨量。其三，杆体挂载有传感器串，该传感器串沿海鸟岛内部的通道布设，穿过暴露的向海礁坪延伸至礁冠，随后沿礁坡下行至约20米深度处，可获取礁坡剖面的垂直观测数据，并监测涌入礁体复合体的水体参数。该杆配备两台坎贝尔科学（Campbell Scientific）数据采集器（一台用于气象站，另一台用于传感器）、扩频无线电以及2.4/5 GHz 802.11无线通信模块，用于与位于研究站附近工坊内的基站进行通信。截至2010年8月，传感器串末端（距杆体约230米处）搭载有SeaBird SBE37传感器，礁冠及礁坡起始段分别布设了两台SeaBird SBE39传感器。该装置每六个月将接受一次维护，未来还可用于挂载新的传感器组。
该中继杆是蜥蜴岛（Lizard Island）更大规模部署项目的组成部分，该项目包含4台浮标与2根中继杆，作为GBROOS项目的一部分进行部署。本设计旨在监测泻湖内水体、涌入礁体的水体，以及可能引发珊瑚白化等热应力事件的上升流或暖水运移现象。中继杆依托2.4/5 GHz 802.11无线通信与坎贝尔900 MHz扩频无线电构建网络骨干，可直接与普弗雷岛（Plafrey Island）上的RP1（中继杆1）通信，而RP1进而将数据传输至研究站的基站。此外，该杆还可与其通信范围内的浮标进行数据交互。该杆同样搭载有维萨拉WXT520气象站，并配备感应调制解调器/耦合器，用于连接感应类仪器至杆体。感应线缆/传感器串沿海鸟岛东侧绕行，穿过礁坪、礁冠进入礁前区域，下行至约20米深度处。