Maximum Horizontal Velocity

Operating Range

Precise Measurements Over Water

Designed for Tactical Applications

3 common challenges of UAV operators

Barometer's are not accurate at low altitude

The LR-D1 is accurate up to 500m

Laser altimeters don't work in all environments

The LR-D1 is a radar altimeter so it works in all weather

GPS sensor accuracy varies by GPS signal strength

The LR-D1 does not rely on anything but itself

Why choose LR-D1 radar altimeter?

Rugged Design

The LR-D1 features a robust enclosure making the altimeter ideal for most heavy duty UAS applications

Reliable Measurements at High Altitude

The LR-D1 has a large bandwidth allowing for greater precision

Designed for Industrial UAV's

The LR-D1 is built for large, high speed aircraft



Frequency24 GHz
Bandwidth250 MHz
Power Consumption11W
Operating Voltage10 – 30 V
Altitude Range0.7m – 500m
Altitude Precision0.365m
Update Rate40 Hz
Field of View43° Azimuth 30° Elevation
Operating Temperature Range-40°C ~ +60°C
Dimensions112mm x 102.5mm x 29mm
IP RatingIP67


What regulatory requirements does the LR-D1 meet?

The LR-D1 has not yet been FCC certified according to FCC Part 15 standards or received the CE marking.

Where can I download the data sheet?
Is the LR-D1 export controlled?

Ainstein components are ITAR free, and do not classify under the US Munitions List governed by the State Department.  Our units ship from the US with an Export Control Classification Number (ECCN) of EAR99, No License Required.  For export, our HS Tariff Code is 8526.10.0000.

What is integration assistance?

Integration assistance includes 6 hours of dedicated customer support from Ainstein’s engineering team, which includes diagnosing and troubleshoot customer technical problems, resolving internal technical issues in software, and training customers in use of the product. A customer’s first purchase of the LR-D1 includes this integration assistance.

What is the range of the LR-D1?

The US-D1 has a maximum range of 500 meters. Other specifications can be found on the LR-D1 page.

Is the LR-D1 waterproof or dustproof?

The LR-D1 is manufactured to an IP rating of IP67 and has been tested to that standard by our manufacturing team. Pursuing IP67 certification by a third party is on our roadmap, but it has not yet been completed.

Can I use the LR-D1 below 0.7m?

Altitudes below 0.7m are within the LR-D1’s blind zone, meaning it is unable to detect distance accurately. Attempting to do so will result in measurements that are volatile and have a low accompanying signal-to-noise ratio.

What is the Signal-to-Noise ratio (SNR)?

Signal-to-noise ratio (SNR) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. SNR is defined as the ratio of signal power to the noise power, often expressed in decibels. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise.

When using the US-D1 according to the instructions provided in the user manual, a SNR of more than 13 dB is indicative of a high-confidence measurement of the radar’s ability to detect the altitude.

How do I know that the LR-D1’s radar reading is valid?

The LR-D1 records both the altitude measurement and a corresponding signal-to-noise ratio measurement with an update rate of 100 Hz. Every measured altitude is recorded with it’s SNR. The signal to noise ratio can be used to validate the integrity of an altitude reading. We typically consider a signal-to-noise ratio of less that 13 dB as a low-confidence measurement.

The LR-D1 also outputs an error code when other factors might be affecting the measurement, such as saturation error at low altitudes. More details about this can be found in the LR-D1 User Manual.

What is the meaning of the radar output? Does it measure the distance to the closest object detected or the distance of the biggest object seen? Or the closest distance to a fitted plane?

The output is primarily the result of the proximity and size of the object detected, but it is also influenced by the material of the object detected and the angle at which the signal is reflecting from the object.

The radar is ultimately designed to detect the distance to the ground below when the ground is the main object in its field of view, and when the radar is facing the ground/water. Other objects in the field of view can cause measurement errors.

Can the LR-D1 operate at high speeds?

Yes, the LR-D1 has been flight tested at 200 m/s and encountered no issues at these speeds. The LR-D1 was designed to be unaffected by extreme operating conditions such as high flight speeds, high bank angled turns, and sharp changes in altitude.

Is there a bench test software tool for the LR-D1?

Yes, there is a bench test software application that can be provided upon request. Please email for more information.

How do I mount the LR-D1?

When mounting the device, the front face of the LR-D1 must be perpendicular to the

ground below the aircraft. The device should be secured to the aircraft, where it is not free to move in any direction. Make sure to mount it in a location where the field of view will be from from any unexpected objects that could cause interference with the proper operation of the aircraft. More details about mounting and integration of the LR-D1 can be found in the LR-D1 User Manual.

How do I update the firmware of my LR-D1?

Ainstein releases new firmware versions for the LR-D1 intermittently improve the performance of the device. When you purchase a unit, it will come with the latest firmware. Only older units require firmware updates.

The details for how to upgrade your US-D1’s firmware can be found in the LR-D1 User Manual. This firmware update process does not require any additional hardware.

Can I mount two LR-D1 units side-by-side and operate them simultaneously?

Two LR-D1 units operating at the same frequency have the possibility of causing interference, which affects the reliability of the altitude measurement. If you would like to operate two units side-by-side, please contact us directly at for help.

Can the LR-D1 see through materials such as fiberglass and carbon fiber?

In most cases the LR-D1 cannot detect through carbon fiber. At low thicknesses, the LR-D1 may be able to detect through fiberglass. Generally milllimeter wave radar cannot see through solid surfaces with accuracy because the beams spread when they hit solid objects, which can create false positives. Also, solid surfaces can absorb radar waves depending on what material they are made of. It is most advisable to keep the LR-D1’s field of view free from any objects.

Will testing indoors cause errors in the LR-D1’s measurements?

Yes, operating the LR-D1 in an indoor environment will be much more likely to cause multi-path reflections. It may cause erroneously high altitude measurements as a result of this. Testing outdoors and in flight is the best way to ascertain the radar’s performance in your application.