Tasks:Laser Rangefinder
From TeamFrednetWiki
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2009 11 27 |
| Task title: | Tasks:Laser Rangefinder |
| Contact person: | Eric Gustafson |
| Blueprint: | (None) |
| Persons working on this task: | (No one) |
| Start: | (ASAP) |
| End: | (ASAP) |
| Group: | Category:Tasks_(Open)-lunar lander |
| Product: | (Undefined) |
| Dependencies: | (Undefined) |
| Impact: | (Undefined) |
| Percent complete: | (0%) |
| Man-hours Remaining: | (999 hours) |
| Relate page: |
Category Page_of_Tasks:Laser Rangefinder not found
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Description:
Suppliers of laser rangefinders must be identified.
Deliverable:
- Suppliers should be listed in Lunar_Lander_Data_Acquisition_and_Control
- A recommendation should be made.
Due Date:
- ASAP
Task description:
- Selection of devices must conform to the following system level requirements for integration with the lander:
Physical aspect: Source: TBD
- weight: < 2 kg (<1 kg desired)
- size: < 0.3x0.2x0.1 meters
- power draw: 10W only in Land Sequence
Operating Voltage: Source: TBD
- 28 VDC (bus voltage)
- Can-do bus provide 5 volts
Range resolution: Source: Landing_Simulation
Range is a trade of: cost/complexity vs Resolution
- Suggestion: +/- 1 meter (almost 5 m because LIDAR coverage is from 30/50 m to ground)
- Required: 10 km ground (Goal: 70 km to ground)
- @10 km
- Z resolution 10 meters,
- Y resolution +/-500 meters and
- X resolution +/-100 meters.
- @1 km
- @10 km
- Z resolution 1 meter
Update rate: Source: Lunar_Lander_Data_Acquisition_and_Control
- Assume the laser achieves a 3nanosecond pulse width, 6 nanosecond peak to peak?
- Required > 70 km: (Optional)
- Update rate < 1 Hz
- Required < 50 km (Mandatory)
- Update rate from 10 - 100 Hz (Constant rate at 10 Hz also valid)
Required bandwith: Source: TBD
- RF Bandwith 58 MHz
False alarm rate: Source: TBD
- Required: <0.01
Wavelength of Laser: Source: TBD
- Required: 1064 nm
Collector/Detector Aperture: Source:TBD
- Required: 10 centimeters
Cost Constraint: Source TBD
- Required: < $20,000 USD
Task participants: who is already working on this task
Related tasks: what are the input (e.g requirements) and output (e.g. deliverables) for this task
Task news: any updated to the task progress
- 09-08-10 New members welcome
Any additional comments/questions:
- For each rangefinder product, the following informations must be obtained (Anders):
- What is the rangefinder's functionality in low pressure and Ultra High Vacuum (UHV) environments?
- What is the rangefinder's maximum range?
- Is the rangefinder's maximum range increased in a UHV environment?
- What kind of surface can be ranged at maximum range?
- If the surface is retroreflective, would that increase the maximum range?
- Is there a maximum repetition rate if external power could be supplied to the rangefinder?
- Ongoing work for the Altimeter is content by the article: Lunar_Lander_Data_Acquisition_and_Control --Joshua 20:30, 27 March 2009 (EDT)
- Also there is a light weight, in development version, of Laser Rangefinder for the Mark-2 Lander.--Tristancho 21:08, 27 November 2009 (UTC)
