Heron Island Sensor Relay Pole 5 (RP5)

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. This pole (RP5) also supports a Vaisala WXT520 weather station.This record is for Sensor Relay Pole 5. 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 as well as a Vaisala WXT520 weather station.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 - 150Logger Setup as router (isRouter = True)SDC7 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

作为赫伦岛（Heron Island）传感器网络部署项目的一部分，六根6米高的钢制立柱已安装于赫伦岛潟湖中。该类立柱兼具两项功能：核心功能为搭建覆盖整片潟湖系统的无线网络骨干架构；次要功能为承载各类安装于立柱本体或从立柱向外延伸的传感器。本立柱（RP5，Sensor Relay Pole 5）同时搭载了一台Vaisala WXT520气象站（Vaisala WXT520）。

本记录对应传感器中继立柱5（Sensor Relay Pole 5，下称RP5）。该立柱采用太阳能供电，负责将传感器浮标（Sensor Floats）及其他传感器中继立柱回传的数据转发至位于赫伦岛的基站（Base Station）。系统采用坎贝尔科学（Campbell Scientific）CR1000数据采集器与RF411扩频无线电（RF411 Spread-Spectrum radios）完成数据处理与转发工作。立柱可兼容多种传感器挂载，本RP5立柱还搭载了一款简易的底部安装式MEA热敏电阻（MEA thermistors），以及一台Vaisala WXT520气象站（Vaisala WXT520）。该设备每六个月将接受一次维护，未来也可用于挂载新增的传感器套件。

该立柱本质上为网络中继节点，可收集其他立柱与传感器浮标的回传数据，并直接或通过其他立柱将数据转发至基站。立柱间距约为2公里，紧邻赫伦岛的立柱除外——岛上基站架设於19米高的塔架之上，因此首批立柱的通信覆盖范围更广。单根立柱可实现半径2公里的无线数据网络覆盖，六根立柱的组合可覆盖整片潟湖。得益于基站的架设高度，其在岛屿周边的覆盖范围可达约5公里。

立柱高度为6米，采用镀锌钢（galvanized steel）制成，顶部搭载太阳能供电的仪器舱，包含太阳能板供电的电池组、Campbell CR1000数据采集器与Campbell RF411无线电。该数据采集器支持多种接口，可兼容多款仪器的连接。本次初始搭载的传感器仅为一款底部安装式MEA热敏电阻，后续将视时机与条件追加更多仪器设备。

### 供电系统
采用蓄电池备份方案（1块33安时AGM蓄电池（AGM）搭配太阳能控制器），搭配4块5瓦太阳能板供电。

### 数据采集器设置
- Pakbus地址：150
- 数据采集器配置为路由模式（isRouter = True）
- SDC7通信板速率设置为34K
- SDC7邻居节点范围：1 - 180
- SDC7信标周期：3600

### 礁上RF网络
RF411无线电连接至数据采集器的CSIO端口
- 无线电设置：活动接口为数据采集器CSDC；SDC地址：7
- 通信协议：支持Pakbus协议
- 无线电网络地址：0
- 跳频序列：0
- 电源模式：重试级别：低