Antenna with sensors for accurate pointing
Determining movement for alignment of a satellite antenna using accelerometer data and gyroscope data of the satellite antenna. Described techniques include receiving accelerometer data for a first time period from an accelerometer mounted on the antenna and analyzing the accelerometer data to determine a movement time window for a movement event of the antenna. The techniques may include receiving gyroscope data for the first time period from a gyroscope mounted on the antenna and analyzing the gyroscope data during the movement time window to determine an amount of movement of the antenna due to the movement event.
1. A method for aligning an antenna with a target device, the method comprising:
performing a first positioning process of the antenna, the first positioning process establishing a first alignment of the antenna based at least in part on a signal quality characteristic of first signals received from the target device;
performing a second positioning process of the antenna based at least in part on the first alignment of the antenna, the second positioning process comprising:
transmitting, by the antenna, second signals at a plurality of angular positioning steps;
capturing sensor data from one or more sensors mounted on the antenna during the plurality of angular positioning steps; and
establishing a second alignment of the antenna, wherein the second alignment of the antenna is based at least in part on signal strength information for the second signals transmitted at the plurality of angular positioning steps and angular positioning information for the plurality of angular positioning steps determined from the captured sensor data.
2. The method of claim 1 , wherein the performing the second positioning process further comprises:
identifying an amount of adjustment for aligning the antenna from a current angular position to the second alignment of the antenna; and
providing an adjustment signal indicating the amount of adjustment for aligning the antenna.
3. The method of claim 2 , wherein the identifying the amount of adjustment comprises:
determining that a peak signal strength for the second signals corresponds to an angular position between a first angular positioning step and a second angular positioning step.
4. The method of claim 3 , wherein the identifying the amount of adjustment comprises:
calculating the angular position corresponding to the peak signal strength based on the signal strength information for the first angular positioning step and the signal strength information for the second angular positioning step and the determined amount of angular movement of the antenna between the first angular positioning step and the second angular positioning step.
5. The method of claim 2 , wherein providing the adjustment signal used to indicate the amount of adjustment for aligning the antenna comprises providing one or more output signals to use as a visual position reference of the antenna on a device external to the antenna.
6. The method of claim 1 , wherein the performing the second positioning process of the antenna further comprises outputting a signal indicating a status of a current angular positioning step relative to a peak crossing for the second signals.
7. The method of claim 1 , further comprising:
determining an orientation of an azimuth axis of the antenna; and
providing an indication of alignment of the determined orientation of the azimuth axis relative to a vertical axis.
8. The method of claim 1 , further comprising:
performing an initial coarse pointing of the antenna in a general direction of the target device.
9. The method of claim 8 , wherein performing the initial coarse pointing is based at least in part on a known latitude and predetermined position data of the target device.
10. The method of claim 1 , wherein the target device is a satellite.
11. The method of claim 1 , wherein the first signals are received at a first frequency and the second signals are transmitted at a second frequency that is higher than the first frequency.
12. The method of claim 1 , wherein the first signals have a first polarization and the second signals have a second polarization that is different than the first polarization.
13. The method of claim 1 , wherein the first positioning process is performed without transmitting the second signals from the antenna.
14. An apparatus, comprising:
an antenna;
an antenna communications assembly for receiving first signals from a target device and transmitting second signals to the target device;
one or more sensors mounted on the antenna, wherein the one or more sensors produce sensor data; and
a movement detection device coupled with the antenna communications assembly and the one or more sensors, wherein the movement detection device:
establishes a first alignment of the antenna with the target device as part of a first positioning process based at least in part on a signal quality characteristic of the first signals received from the target device; and
establishes, based at least in part on the first alignment of the antenna, a second alignment of the antenna with the target device as part of a second positioning process, wherein the second positioning process comprises:
initiating transmission by the antenna communications assembly of the second signals at a plurality of angular positioning steps;
capturing the sensor data from the one or more sensors during the plurality of angular positioning steps; and
determining the second alignment of the antenna, wherein the second alignment of the antenna is based at least in part on signal strength information for the second signals transmitted at the plurality of angular positioning steps and angular positioning information for the plurality of angular positioning steps determined from the captured sensor data.
15. The apparatus of claim 14 , wherein the one or more sensors mounted on the antenna comprise:
an accelerometer mounted on the antenna, wherein the accelerometer produces accelerometer data; and
a gyroscope mounted on the antenna, wherein the gyroscope produces gyroscope data.
16. The apparatus of claim 14 , wherein, to establish the second alignment of the antenna, the movement detection device:
identifies an amount of adjustment for aligning the antenna from a current angular position to the second alignment of the antenna; and
provides an adjustment signal indicating the amount of adjustment for aligning the antenna.
17. The apparatus of claim 16 , wherein, to identify the amount of adjustment, the movement detection device:
determines that a peak signal strength for the second signals corresponds to an angular position between a first angular positioning step and a second angular positioning step.
18. The apparatus of claim 17 , wherein, to identify the amount of adjustment, the movement detection device:
calculates the angular position corresponding to the peak signal strength for the second signals based on the signal strength information for the first angular positioning step and the signal strength information for the second angular positioning step and the determined amount of angular movement of the antenna between the first angular positioning step and the second angular positioning step.
19. The apparatus of claim 16 , wherein the adjustment signal used to indicate the amount of adjustment for aligning the antenna comprises one or more output signals to use as a visual position reference of the antenna on a device external to the antenna.
20. The apparatus of claim 14 , wherein the movement detection device outputs a signal indicating a status of a current angular positioning step relative to a peak crossing for the second signals during the second positioning process.
21. The apparatus of claim 14 , wherein the movement detection device further:
determines an orientation of an azimuth axis of the antenna; and
provides an indication of alignment of the determined orientation of the azimuth axis relative to a vertical axis.
22. The apparatus of claim 14 , wherein, to establish the first alignment of the antenna, the movement detection device outputs an indicator of a coarse pointing of the antenna using a known latitude and predetermined position data of the target device.
23. The apparatus of claim 14 , wherein the first signals are received at a first frequency and the second signals are transmitted at a second frequency that is higher than the first frequency.
24. The apparatus of claim 14 , wherein the first signals have a first polarization and the second signals have a second polarization that is different than the first polarization.
25. The apparatus of claim 14 , wherein the first positioning process is performed without transmitting the second signals from the antenna.
26. An apparatus for aligning an antenna with a target device, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
establish a first alignment of the antenna with the target device as part of a first positioning process based at least in part on a signal quality characteristic of first signals received by the antenna from the target device; and
establish, based at least in part on the first alignment of the antenna, a second alignment of the antenna with the target device as part of a second positioning process, wherein establishing the second alignment comprises:
initiating transmission of second signals via the antenna at a plurality of angular positioning steps;
capturing sensor data from one or more sensors mounted on the antenna during the plurality of angular positioning steps; and
determining the second alignment of the antenna, wherein the second alignment of the antenna is based at least in part on signal strength information for the second signals transmitted at the plurality of angular positioning steps and angular positioning information for the plurality of angular positioning steps determined from the captured sensor data.