Discussion:
do ers 1-2 satellite continiously transmit microwave
(too old to reply)
mustafa umut sarac
2006-01-24 18:25:38 UTC
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do ers 1-2 satellite continiously transmit microwave ?
How many years of working life remained ?
What are their working frequency ?

Best ,

Mustafa Umut Sarac
Renato Croci
2006-01-28 17:35:12 UTC
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Post by mustafa umut sarac
do ers 1-2 satellite continiously transmit microwave ?
ERS-2 does. ERS-1 died in 2000, after 9 years of good services
Post by mustafa umut sarac
How many years of working life remained ?
IIRC, ERS-2 was launched 1996, so not much
Post by mustafa umut sarac
What are their working frequency ?
AMI (SAR + scatterometer): 5530 MHz, bandwidth (IIRC) 15 MHz
Radar Altimeter: 13800 MHz, bandwidth 330 MHz

Then, there is the X-band data link (around 8.0-8.2 GHz) and the S-band
telemetry link.

I suggest a look at the ESA sita (www.esa.int) for updates

(both chirped)
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Alpha
mustafa umut sarac
2006-02-02 16:45:19 UTC
Permalink
Dear Renato Croci , Thank you for your kind message.
I want to learn that do ers 2 always send microwave to earthsurface or
does it send signal when it receives a order from ground station ?
And I want to build a passive sar with the help of this satellite
because it passes Anatolia and it has a sar.
Where can I find the necessary receiver schematic and parts ?
Can anyone share his her knowledge ?

Best ,
Mustafa Umut Sarac
Post by Renato Croci
Post by mustafa umut sarac
do ers 1-2 satellite continiously transmit microwave ?
ERS-2 does. ERS-1 died in 2000, after 9 years of good services
Post by mustafa umut sarac
How many years of working life remained ?
IIRC, ERS-2 was launched 1996, so not much
Post by mustafa umut sarac
What are their working frequency ?
AMI (SAR + scatterometer): 5530 MHz, bandwidth (IIRC) 15 MHz
Radar Altimeter: 13800 MHz, bandwidth 330 MHz
Then, there is the X-band data link (around 8.0-8.2 GHz) and the S-band
telemetry link.
I suggest a look at the ESA sita (www.esa.int) for updates
(both chirped)
--
-----
Alpha
Renato Croci
2006-02-05 15:27:15 UTC
Permalink
The AMI SAR operates in a programmed way, i.e. do not necessary work
continously, but according a mission plan established by ESA.

Apart that, if you have to design something, it would be better to use the
more recent ENVISAT instead of ERS-2, I believe doing a passive SAR with a
non-cooperating transmitter would be a real technical nightmare, mainly
for synchronisation... not to mention processing.

It's an option I do not recommend.

Cheers

Renato
Post by mustafa umut sarac
Dear Renato Croci , Thank you for your kind message.
I want to learn that do ers 2 always send microwave to earthsurface or
does it send signal when it receives a order from ground station ?
And I want to build a passive sar with the help of this satellite
because it passes Anatolia and it has a sar.
Where can I find the necessary receiver schematic and parts ?
Can anyone share his her knowledge ?
Best ,
Mustafa Umut Sarac
Alpha

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