| Main Title |
Development of Range Squared and Off-Gating Modifications for a Lidar System. |
| Author |
Bethk, George W. ;
|
| CORP Author |
General Electric Co., Philadelphia, Pa. Space Div. |
| Year Published |
1973 |
| Report Number |
EPA-68-02-0570; 650/2-73-040; |
| Stock Number |
PB-228 715 |
| Additional Subjects |
Optical radar ;
Plume detection ;
Range gating ;
Revisions ;
Smoke ;
Air pollution ;
Remote sensing ;
Photomultiplier tubes ;
Data processing ;
Transmittance ;
Measurement ;
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-228 715 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
54p |
| Abstract |
The study was intended to eliminate the dorminant source of error in the remote measurement of smoke-stack plumes using lidar, and to improve the data presentation of the lidar transmittance measurement. The use of a special grid-controlled photomultiplier tube and off-gating system has resulted in a large reduction of photomultiplier tube afterpulsing which has been the principal problem limiting the accuracy of plume transmittance measurements. A range-correcting time-squared amplifier has also been developed which permits much faster and more convenient data reduction than formerly possible. The above two developments have been adapted to an existing van-mounted EPA lidar system; and the improved overall system accuracy has been evaluated using both opaque and semi-transparent targets of known transmittance. (Author) |
| NTIS Title Notes |
Environmental Protection Technology series 27 Jun 72-5 Sep 73 (Final). |
| PUB Date Free Form |
Sep 73, |
| Category Codes |
17H; 13B; 63F; 68A |
| NTIS Prices |
PC A04/MF A01 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
326578010 |
| Origin |
NTIS |
| Type |
CAT |
