er data. The
nage sensor
n. At initial
d ICRISAT
ted asbestos
n images in
on Chharodi
eth at which
n, Contrast,
ons aided in
tral, spatial
r sensor can
cision. The
range of
nput signal
TES PAN
di Test Site
icial targets.
t Cattle farm
arm contains
er. This farm
AU). Under
GAU, 300m
IRS Sensor
ently fenced
ter removing
such as flat
ntifiable area
g experiment
een given to
ind the clock
eld Spectro-
350 nm to
er complete
iance data in
P.
I' ON SITE
Ht x 8ft size.
able size and
get variable
ge measuring
IAPRS & SIS, Vol.34, Part 7, “Resource and Environmental Monitoring”, Hyderabad, India,2002
parameters specific requirements. The sketch of artificial target
deployment on Chharodi test site & its acquired TES PAN
Image is given in Figl. The summary of specially designed
parameter specific artificial Target is given in Table-2. The
advantage of this design is simultaneous measurement of all
Image Sensor Parameter in rural area, which was made possible
due to TES PAN Sensor spatial resolution of 1m x 1m. The
targets are deployed at identified location and distances
between targets are measured accurately.
! i 4 i = me - D
! À i i m--- ; 2d i |
- = ! |
ik Ui i
| JL 4L des :
5 nc e
wo ELI : i
! go Ge : T! |
TARGET LAYOUT DVER CHHARODI CALIBRATION SITE
Fig la
M ^ * AE NA Ani: w k.
TES IMAGE OF CHHARODI CALIBRATION SITE WITH VARIOLU
ARTIFICIAL TARGETS DEPLOYMENT ON 11th DEC 2001
Fis Th
S
4.0 IMAGE SENSOR PARAMETERS
Technology Experiments Satellite (TES) carried a
panchromatic sensor of spectral bandwidth (0.50-0.86 pm)
with a spatial resolution of Imeter x 1 meter at an altitude of
560 Km. The basic image sensor parameters are as follows:
4.1) Point Spread Function:
The Sensor modifies the spatial properties of the object (scene
or target) due to blurring and geometry distortion. The blurring
occurs on a smaller spatial scale for few pixels than geometry
distortion where smaller details are missed. The blurring due to
sensor optics, detector & electronics are characterized by total
sensor point spread function.
4.2) Sample Scene Phase:
Sample-Scene-Phase characterizes
the uncertainty in the
location of the scene with respect to known sampling grid of
Sr. | Parameter Target Size Description
no Reflectance
1 Detectability 3m x .3m 38.0 %
.]5m x .75m
1.0m x 1.0 m
.9m T Shaped
2 Adjacency 3m x 3m Black : 4.0 96 of Black
Effect Target at center of Target deployed at
32m x 32m Gray center of 38.0% of
Target Gray Target 7
3m x 3m Gray 38.0% of Gray
Target at Center of Target at center of
32m x 32m Bare 17.096 of Bare soil.
Soil
3 Uniform 39m x 39m Black 4.7%
Target for Target
Radiance / 32m x 32m Bare 17%
Digital Soil
numbers 32m x 32m Gray 38%
Target
6m x 6m RCC / 8896
Target
4 Along / Across 1m x 12.2m 4.0% reflectance
Track High 2m x 12.2m for Black
Contrast 3m x 122m ' 38.0% reflectance
Black/Gray dm x 122m for Gray
BARS
5 Along / Across | Imx 12.2 m 17.0% for Bare
Track Medium | 2m x 12.2m Soil
Contrast Gray /. | 3m x 122m 38.0% for Gray
Bare soil / am x 122m Target
BARS
6 Sample-Scene- | (5x5) matrix of 17.096 for Bare
Phase (Im x Im) size with | Soil
incremental 38.0% for Gray
quarter pixel shift Target
7 Ground Sample | 300m x 300m Test 17.0 Reflectance of
Distance site identifiable by Bare Soil & 88%
RCC structure.
of Lime Powder.
Table-2 Specially Designed TES PAN Sensor Parameter
Specific Artificial Target
the system. The two extreme sample-scene phases result in a
spatial signal that has either maximum contrast or no contrast,
which is again, a measure of target blurring effect. Two-
dimensional array of (5x5) matrix was arranged from (Im x
1m) target size with 0.25,0.5,0.75 & 1.0 pixel shift in along
/across track direction to quantify sample-scene-phase effect
