| Abstract: | NASA‘s Experimental Advanced Airborne Research Lidar (EAARL) is a raster-scanning, waveform-resolving, green-wavelength (532 nm) lidar designed to map near-shore bathymetry, topography, and vegetation structure simultaneously. The EAARL sensor records the time history of the return waveform within a small footprint (20 cm diameter) for each laser pulse, enabling characterization of vegetation canopy structure and "bare earth" topography under a variety of vegetation types. A collection of individual waveforms combined within a synthesized large footprint was used to define three metrics: canopy height (CH), canopy reflection ratio (CRR), and height of median energy (HOME). Bare Earth Elevation (BEE) metric was derived using the individual small-footprint waveforms. All four metrics were tested for reproducibility, which resulted in an average of 95 percent correspondence within two standard deviations of the mean. CH and BEE values were also tested for accuracy using ground-truth data. The results presented in this paper show that combining several individual small-footprint laser pulses to define a composite "large-footprint" waveform is a possible method to depict the vertical structure of a vegetation canopy. ?? 2006 American Society for Photogrammetry and Remote Sensing. |
| Genre: | Article |
| ProdID: | 70028622 |
| Citation Author: | Nayegandhl, A.; Brock, J. C.; Wright, C. W.; O'Connell, M. J. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 1417 |
| Citation Issue: | 12 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Photogrammetric Engineering and Remote Sensing |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 11 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Evaluating a small footprint, waveform-resolving lidar over coastal vegetation communities; 2006; Conference Paper; Photogrammetric Engineering and Remote Sensing; Nayegandhl, A.; Brock, J. C.; Wright, C. W.; O‘Connell, M. J. |
| Citation Start Page: | 1407 |
| Citation Volume: | 72 |
| Citation Year: | 2006 |
| Type: | citation/reference |
| Text: | Evaluating a small footprint, waveform-resolving lidar over coastal vegetation communities; 2006; Conference Paper; Photogrammetric Engineering and Remote Sensing; Nayegandhl, A.; Brock, J. C.; Wright, C. W.; O‘Connell, M. J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 2006 00:00 -0600 |
| Publisher: | |
