TABLE 1.1 Comparison of SAR Systems

Parameter

ERS-1

ERS-2

SIR-C

SIR-C/X-SAR

Radarsat

Envisat (ASAR)

JERS-1

PALSAR

MIR-PRIRODA

ALMAZ-1

MITI SAR-2

Radar band

C

C

C, L

X

C

C>

L

L

L,S

S

L

Polarization

VV

VV

ALL

VV

HH

HH,VV,HV

HH

HH or VV

HV or VH

*

HH

HH

Look angle (degrees)

24

24

17-60 ^

17-60

10-60

20-45

35

20-55

35

30-60

20-45

Resolution (m)/per number of looks

25/4

25/4

25/4

25/4

10-100/1-8

30/4

18/3

10-100/1-8

*

15/2

10-100/*

Swath width (km)

100

100

15-100

15-40

50-500

50-400

76

70-250

120

20-45

50-500

System sensitivity (dB)

-25

-25

-50

-22

-23

*

-20

-25

*

*

-25

Altitude (km)

790

785

225

225

790

600

568

700

394

300

700

Simultaneous frequencies

1

1

3

3

1

1

1

1

2

1

1

Simultaneous polarizations

1

1

4

4

1

2

1

2

*

1

1

Orbit inclination (degree)

97.7

97.7

57

57

98.6

100

93.7

98

51.6

72.7

97.7

Bandwidth (MHz)

13.5

13.5

10, 20

10, 20

12-30

14

15

30

*

*

50

Data rate (Mbps)

105

105

90 or 46 per channel

45

105 (direct) 85 (recorded)

100

60

240

*

*

240

Launch date

07/91

04/95

04, 10/94

04, 10/94

11/95

1999

02/92

08/2002

TBD

03/91

2004

Design lifetime (yrs)

3

3

11 days

11 days

5

5

2

3-5

2

2

3-5

* Information unavailable

NOTE: dB = decibels; HH = horizontal horizontal polarization; HV = horizontal vertical polarization; VH= vertical horizontal polarization; VV = vertical vertical polarization; Mbps = megabits per second; TBD = to be determined.

SOURCE: Jet Propulsion Laboratory, Working Group Draft Report, JPLD-13945,Jet Propulsion Laboratory, Pasadena, California, p. 12.



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