1. No category

Pi-SAR-L2 Geometric Conversion and the contents of the facter_md (Version
1), April 28, 2014, Shimada Masanobu
The following equation (1) can convert the pixel/line to latitude/longitude of
the SLC and geo-coded products.
lat =
mmr−1 mma−1
∑ ∑ a (line − line )
i, j
i=0
lon =
mma−1− j
c
j=0
mmr−1 mma−1
∑ ∑ b (line − line )
i, j
i=0
( pixel − pixelc )mmr−1−i + latc
mma−1− j
c
( pixel − pixelc )mmr−1−i + lonc
(1)
j=0
ai, j = fac[ j + i ⋅ mmr]
bi, j = fac[ j + i ⋅ mma]
Incidence angle can be expressed by the following equation
inci =
mmr−1
∑ c ⋅line
i
i
i=0
(1)
ci = fac[i]
Data format of the related factor is facter_md
No
Contents
Remarks
0
Acquisition year (YYYY)
1
Acquisition date (DDD) （Total
dates in a year 年内通算日）
2
Acquisition second (SSSS.SS)
（日内通算秒）
3
Latitude
of
scene
center
scene
center
(radian): latc
4
Longitude
of
(radian): lonc
5
Image size: nx- > pixelc=nx/2
6
Image size: ny>linec=ny/2
7
mmr
8
mma
9
process
level
：
0:SLC,
1:gcode,2:ortho
10
Prf(Hz)
At the origin and
ECR
11
X (km)
Ditto
12
Y (km)
Ditto
13
Z (km)
Ditto
14
Vx (km/s)
Ditto
15
Vy (km/s)
Ditto
16
Vz (km/s)
Ditto
17
Imaxa: This line number is used Number of lines of
for the
SLC
data
generation
18
Doppler gradient a
Fd=a*r+b
19
Doppler offset b
Fd=a*r+b
20
R0
R=r0+dr*j
21
dr
R=r0+dr*j
22~22+
a
mmrxmma-1
22+mmrxmma~
b
22+2xmmrxmma-1
22+2xmmrxmma~
c
mmr-1
22+2xmmrxmma~
number of pixels (in X)
mmr
22+2xmmrxmma~
mmr+1
22+2xmmrxmma~
Level 1.5, 2.1 の場
合
Number of lines (in Y)
Level 1.5, 2.1 の場
合
X coordinate of the upper/left Level 1.5, 2.1 の場
mmr+2
corner of the map？
22+2xmmrxmma~
Y coordinate of the upper/left Level 1.5, 2.1 の場
mmr+3
corner of the map
合
22+2xmmrxmma~
Pixel spacing (km)
Level 1.5, 2.1 の場
mmr+4
22+2xmmrxmma~
合
合
NA (system parameter)
mmr+5
Level 1.5, 2.1 の場
合
22+2xmmrxmma~
Left/upper latitude 左上隅の緯度 Level 1.5, 2.1 の場
mmr+6
(degree)
22+2xmmrxmma~
Left/upper longitude 左上隅の経 Level 1.5, 2.1 の場
mmr+7
度 (degree)
22+2xmmrxmma~
Right/upper latitude 右上隅の緯 Level 1.5, 2.1 の場
mmr+8
度 (degree)
22+2xmmrxmma~
Right/upper longitude 右上隅の Level 1.5, 2.1 の場
mmr+9
経度 (degree)
22+2xmmrxmma~
Right/bottom latitude 右下隅の Level 1.5, 2.1 の場
mmr+10
緯度 (degree)
22+2xmmrxmma~
Right/bottom longitude 右下隅の Level 1.5, 2.1 の場
mmr+11
経度 (degree)
22+2xmmrxmma~
Left/bottom latitude 左下隅の緯 Level 1.5, 2.1 の場
mmr+12
度 (degree)
22+2xmmrxmma~
Left/bottom longitude 左下隅の Level 1.5, 2.1 の場
mmr+13
経度 (degree)
合
合
合
合
合
合
合
合
Potion at the nth line can be estimated by the following equations
i
prf
i
yi = y0 + vy ⋅
prf
i
zi = z0 + vz ⋅
prf
xi = x 0 + v x ⋅