Heron Island Sensor Relay Pole 6 (RP6)

A series of six 6m steel poles have been installed in the lagoon of Heron Island as part of the sensor network deployment at Heron Island. The poles serve two purposes; their primary purpose is to form the backbone of a wireless network that covers the entire lagoon system and secondly they themselves support a range of sensors mounted onto the pole or leading away from the pole. One pole (RP5) also supports a Vaisala WXT520 weather station.This record is for Sensor Relay Pole 6. The pole is solar powered and routes data from the Sensor Floats and other Sensor Relay Poles back to the Base Station located on Heron Island. The system uses the Campbell Scientific CR1000 loggers and RF411 Spread-Spectrum radios to process and route the data. The poles also can support a range of sensors, this pole also has a simple bottom mounted thermistor using the MEA thermistors.The unit will be serviced every six months and will be used in the future for attaching new sets of sensors. The pole works primarily as a network repeater, it collects data from other poles and the Sensor Floats and routes it back to the Base Station either directly or via another pole. The poles are spaced approximately every two kilometers with the exception of those closest to the island, the base station on the island is on a 19M tower and so a greater range was found for the first set of poles.Each pole therefore provides a wireless data network in a two kilometer radius, the combination of the six poles provides coverage for the entire lagoon. The height of the base station gives around a five kilometre range around the island itself.The poles are 6M in height constructed from galvanized steel with a solar powered instrument top consisting of a battery unit powered from the solar panels, Campbell CR1000 logger and Campbell RF411 radio. The logger can support a range of interfaces and is suitable for connection to a range of instruments.The initial instrumentation is just a single base mounted MEA thermistor, the intention is to add more instruments as time and opportunity allow. Power SupplyBattery Backed (1 x 33Ahr AGM with Solar Regulator), 4 x 5W Solar Panel Supply.Logger Settings - Pakbus Address - 160Logger Setup as router (isRouter = True)CSDC7 comms board rate set at 34KSDC7 neighbours range: 1 - 180SDC7 Beacon: 3600Over-Reef RF Network - RF411 attached to the CSIO port of the loggerRadio Settings - Active Interface - Datalogger CSDCSDC Address 7Protocol: Pakbus awareRadio Net Address - 0Hop Sequence - 0Power mode - Retry level - Low

本项目为苍鹭岛（Heron Island）传感器网络部署的组成部分，已在该岛泻湖内安装六根6米长钢制立杆。此类立杆兼具两项核心功能：其一，构建覆盖整个泻湖系统的无线网络骨干架构；其二，作为搭载各类传感器的基座，传感器可直接安装于立杆或从立杆向外布设。其中一根编号为RP5的立杆还搭载了Vaisala WXT520气象站（Vaisala WXT520 weather station）。

本记录对应传感器中继立杆6号（Sensor Relay Pole 6）。该立杆采用太阳能供电，负责将传感器浮标（Sensor Floats）及其他中继立杆采集的数据回传至位于苍鹭岛的基站。本系统使用坎贝尔科学（Campbell Scientific）CR1000数据记录仪与RF411扩频无线电（RF411 Spread-Spectrum radios）完成数据处理与传输路由。

该立杆可搭载多类传感器，本立杆还加装了一枚安装于底部的MEA热敏电阻（MEA thermistors）。本设备每半年将接受一次维护，未来还将预留接口用于挂载新增传感器组。该立杆的核心功能为网络中继：采集其他立杆与传感器浮标的数据后，直接或通过其他中继立杆将数据回传至基站。

立杆间距约为2公里，仅靠近岛屿的立杆除外——岛上基站架设于19米高的塔架之上，因此首批立杆的信号覆盖范围更大。每根立杆的无线覆盖半径约为2公里，六根立杆的组合可实现整个泻湖的全覆盖。基站的高位架设可实现岛屿周边约5公里的信号覆盖范围。

立杆高度为6米，采用镀锌钢制材质，顶部搭载太阳能供电的仪器舱，内含由太阳能板供电的电池单元、Campbell CR1000数据记录仪与Campbell RF411无线电。该数据记录仪支持多类接口，可适配多种仪器连接。

本次初始搭载的仪器仅为一枚安装于基座的MEA热敏电阻，后续将根据时间与可行性逐步增加仪器挂载。

### 电源供应
备用电源为1块33安时AGM电池搭配太阳能调节器，辅以4块5W太阳能板供电。

### 记录仪参数设置
- Pakbus地址：160
- 配置为路由器模式（isRouter = True）
- CSDC7通信板速率设置为34K
- SDC7邻节点范围：1 - 180
- SDC7信标周期：3600

### 礁上射频网络
RF411无线电连接至记录仪的CSIO端口
无线电参数设置：
- 激活接口：数据记录仪CSDC
- SDC地址：7
- 协议：支持Pakbus
- 无线电网络地址：0
- 跳频序列：0
- 功耗模式：重试等级为低