Scheduling of Network RTK Messages

3.1.7 Scheduling of Network RTK Messages
Scheduling of the Network RTK messages is a crucial procedure in the rover application. In general the concept chosen for Network RTK messages accommodates a number of different schemes. In order to achieve interoperability, some guidelines are necessary that limit the scheduling but not the resulting performance.
网络RTK报文的调度是漫游者应用中的一个关键步骤。一般来说，为网络RTK消息选择的概念适应了许多不同的方案。为了实现互操作性，需要一些限制调度但不限制结果性能的准则。

 The recommended guidelines for scheduling are:  

 First, dissemination of raw observation message (1003 or 1004, for example) containing Master reference station data at a high data rate (0.5 – 2 Hz) immediately when information is available (low latency).
首先，原始观测信息(例如1003或1004)在信息可用时立即以高数据速率(0.5 - 2hz)传播主参考站数据(低延迟)。
 Next, dissemination of ionospheric (dispersive) and geometric (non-dispersive) Correction Difference messages for all Auxiliary Reference Stations ((1015 and 1016) or 1017 for GPS and (1037 and 1038) or 1039 for GLONASS) at identical epoch times. The chosen epoch time should be identical to an epoch time as for the respective raw observations of the Master Reference Station. The update rate may be identical or at a lower data rate than for raw observations. For operation with Correction Difference messages (1015 and1016) or (1037 and 1038), the epoch time should be identical for both messages. The maximum interval should not exceed 15 seconds. When Correction Differences are updated at a lower rate than the Master Reference Station observations, both the ionospheric and the geometric carrier phase components may be filtered to reduce the effect of noise.
接下来，电离层(色散)和几何(非色散)校正差值信息在相同的历元时间传播给所有辅助参考站((1015和1016)或1017 (GPS和(1037和1038)或1039 (GLONASS))。对于主参考站的各个原始观测，所选择的历元时间应该与历元时间相同。更新速率可以相同，也可以低于原始观测的数据速率。对于带有更正差异消息(1015和1016)或(1037和1038)的操作，这两个消息的epoch时间应该相同。
 Network Auxiliary Station Data (1014): The complete set of station information messages for all Master and Auxiliary Reference Stations within the data stream may be distributed over time in order to optimize throughput. The dissemination should be completed after a maximum time span of 15 seconds (optimization of start-up time of rover operation).
网络辅助站数据(1014):数据流中所有主站和辅助参考站的一整套站信息报文可以随时间分布，以优化吞吐量。传播时间不超过15秒(优化漫游车运行启动时间)。
 Other messages with additional information as needed for proper rover operation (see Table 3.1-2) should be transmitted as required.
其他需要附加信息的信息(见表3.1-2)应按要求传送。

For combined GPS/GLONASS operation, GPS data should be transmitted first.

Scheduling schemes within these bounds are recommended for best operation of a Network RTK provider service with Network RTK messages.

These recommended guidelines are based on the scheduling used during interoperability testing, using two different update rates. These rates were chosen to represent typical RTK operations in the field, and are described in Tables 3.1-3 and 3.1-4. Other update rates can be employed, but a Service Provider should be aware that these are the only ones that were tested for interoperability. 这些推荐的指南基于互操作性测试期间使用的调度，使用两种不同的更新速率。这些比率被选择来代表现场典型的RTK操作，表3.1-3和3.1-4描述了这些比率。可以使用其他更新速率，但是服务提供者应该知道，只有这些速率经过了互操作性测试。