1074

#include<stdio.h>
main()
{
	char c;
	int count=0;
	scanf("%c",&c);
	while(c!=' ')
	{
		if(c=='$')count++;
		scanf("%c",&c);
	}
	printf("%d",count);
}

### RTCM 3.3 Protocol Message 1074 Details and Usage Message 1074 in the RTCM (Radio Technical Commission for Maritime Services) SC-104 standard version 3.3 is specifically designed for transmitting differential corrections from a reference station to user equipment. This message type contains information that enhances GNSS positioning accuracy by providing real-time correction data. #### Structure of Message 1074 The structure includes several key components: - **Station ID**: Identifies the specific base station sending the corrections. - **Reference Station Position**: Provides coordinates of the reference station used as the origin point for all measurements. - **GPS Epoch Time**: Indicates when observations were made at the reference station. - **Number of Satellites Used**: Specifies how many satellites contributed to forming this particular set of corrections. - **Satellite PRN Numbers & Corrections**: For each satellite involved, detailed pseudorange and phase range corrections are provided along with their associated uncertainties[^1]. This format ensures users can apply these adjustments accurately within their own systems without needing additional processing steps or external inputs beyond what's contained inside packet 1074 itself. #### Application Scenarios In practical applications such as surveying, mapping, maritime navigation, aviation, and autonomous vehicle guidance where high precision location services matter most, utilizing messages like 1074 allows operators to achieve centimeter-level accuracies over wide areas efficiently while maintaining robustness against common sources of error found in standalone GPS solutions. For implementation purposes, developers working on projects involving precise timing synchronization between multiple devices might find value in integrating support for handling incoming streams containing packets similar to those described here into custom firmware designs targeting embedded platforms equipped with appropriate radio hardware capable of receiving signals compliant with RTCM standards. ```python def process_rtcm_message_1074(data_stream): """ Processes an input byte stream representing an RTCM 3.3 Type 1074 message, extracting relevant fields including station identifier, time stamp, number of satellites observed, and individual satellite correction values. Args: data_stream (bytes): Raw binary content conformant to RTCM specification Returns: dict: Extracted parameters organized logically based on message definition """ result = {} # Parsing logic goes here... return result ```
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