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39 lines
2.0 KiB
Markdown
39 lines
2.0 KiB
Markdown
# Ainstein US-D1 Standard Radar Altimeter
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:::tip
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This supersedes the _Aerotenna uLanding Radar_ (discontinued) but uses the same driver/setup.
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:::
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The _Ainstein_ [US-D1 Standard Radar Altimeter](https://ainstein.ai/us-d1-all-weather-radar-altimeter/) is a compact microwave rangefinder that has been optimised for use on UAVs.
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With a sensing range of about 50 metres, it is useful for applications including terrain following, precision hovering (e.g. for photography), anti-collision sensing etc.
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Particular advantages of this product are that it can operate effectively in all weather conditions and over all terrain types (including water).
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The user manual can be found [here](https://ainstein.ai/wp-content/uploads/US-D1-Technical-User-Manual-D00.02.05.docx.pdf).
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The rangefinder is not automatically included in most firmware, and hence cannot be used just by setting a parameter through _QGroundControl_ (as is possible with some other rangefinders).
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To use it you will need to add the driver to firmware and update a configuration file to start the driver on boot.
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The sections below explain how.
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## Hardware Setup
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The rangefinder is supported by any hardware which runs a NuttX or Posix OS and which can offer a serial port for the interface.
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Minimally this will include most, if not all, [Pixhawk Series](../flight_controller/pixhawk_series.md) controllers.
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US-D1 can be connected to any unused _serial port_ (UART), e.g.: TELEM2, TELEM3, GPS2 etc.
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## Parameter Setup
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[Configure the serial port](../peripherals/serial_configuration.md) on which the lidar will run using [SENS_ULAND_CFG](../advanced_config/parameter_reference.md#SENS_ULAND_CFG).
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There is no need to set the baud rate for the port, as this is configured by the driver.
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::: info
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If the configuration parameter is not available in _QGroundControl_ then you may need to [add the driver to the firmware](../peripherals/serial_configuration.md#parameter_not_in_firmware):
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```plain
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CONFIG_DRIVERS_DISTANCE_SENSOR_ULANDING_RADAR=y
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```
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:::
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