# Survey3 Camera Ports You can connect either 1 or 2 Survey3 cameras to the DAQ-A. The ports are labeled 1 or 2. Here is the pin-out for the camera ports:

Pin Number	Function
1	Power Input/Output (5V)
2	Ground
3	GPS (UART)
4	Camera Trigger (PWM)
5	Camera Exposure Strobe (Relay)
6	Ground

The GNSS sensor data in the DAQ-A is sent via pin 3 to the Survey3 cameras to be saved in the captured image geolocation metadata. Every time the camera captures an image it will send the exposure pulse on pin 5 to be logged by the DAQ-A. Depending on which camera it is, either 1 or 2, the exposure pulse will be logged separately. The exposure events in the DAQ-A log will be used in our image processing to perform PPK correction, which improves the image location data. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://mapir.gitbook.io/daq/daq-a/survey3-camera-ports.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.