Import ALOS-2 CEOS

agustan · June 28, 2015, 4:02pm

I’ve installed SNAP 2.0 beta testing for Mac OS X and download the installation for S1TBX package. However, I can not import SAR data for ALOS-2 CEOS in any level data product (1.1; 1.5 and 2.1). Thanks and best regards,
agustan

lveci · June 28, 2015, 6:21pm

This should be fixed now

jmbcarreiras · July 3, 2015, 1:40pm

I’m trying to import both ALOS PALSAR and ALOS-2 PALSAR-2 level 1.1 (CEOS format) and I’m always getting the same error message:

org.esa.s1tbx.io.ceos.basic.BasicCeosProductReader
[input=path to VOL file]:
java.lang.NullPointerException

Details OS and Product:
Product Version: SNAP 201411181905
Java: 1.8.0_45; Java HotSpot™ 64-Bit Server VM 25.45-b02
Runtime: Java™ SE Runtime Environment 1.8.0_45-b14
System: Windows 7 version 6.1 running on amd64; Cp1252; en_gb (snap)

Many thanks and best wishes
Joao

fwiig · July 9, 2015, 10:21am

I also have installed SNAP on a windows platform and I also have the same error. I get it with both ALOS PALSAR and ALOS-2 PALSAR.

I also cannot open TerraSAR-X data but I get a different error:

org.esa.sb1tbx.io.terrasarx.TerraSarXProductReader
[input=pathe to xml file]:
The product’XXX’ already contains a band with the name ‘i_HH_SRA_STRIP_001’.

However, my Radarsat-2 data seems to work fine.

Any help would be appreciated.
Thank you
Frances

orca · August 18, 2015, 7:28am

Hi!

I am not sure this problem was already fixed. I still have the same problems
in importing ALOS2/ALOS level 1.1 data with SNAP 2.0 beta 5.

(1) ALOS2 CEOS data import error
When I tried to import CEOS data by File > Import > SAR Sensors > ALOS2 CEOS,
I got the following error.
------------------------------------ Error Dialog ------------------------------------
org.esa.s1tbx.io.ceos.basic.BasicCeosProductReader
[input=F:\XXXXXXXXXX_001001_ALOS2YYYYYYYYY\VOL-ALOS2YYYYYYYYY-ZZZZZZ-UBSR1.1__D]:
java.lang.NullPointerException
-------------------------------------------------------------------------------------------

The following is the log data.
SEVERE [org.esa.snap]: Unable to open volume_descriptor.xml: null
SEVERE [org.esa.snap]: Unable to open volume_descriptor.xml: null
SEVERE [org.esa.snap]: Unable to open volume_descriptor.xml: null
SEVERE [org.esa.snap]: Unable to open volume_descriptor.xml: null
SEVERE [org.esa.snap]: Unable to open volume_descriptor.xml: null
org.esa.s1tbx.io.ceos.basic.BasicCeosProductReader
[input=F:\XXXXXXXXXX_001001_ALOS2YYYYYYYYY\VOL-ALOS2YYYYYYYYY-ZZZZZZ-UBSR1.1__D]:
java.lang.NullPointerException

(2) ALOS CEOS data import error
I got the same error for ALOS PALSAR.

SEVERE [org.esa.snap]: Unable to open volume_descriptor.xml: null
SEVERE [org.esa.snap]: Unable to open volume_descriptor.xml: null
SEVERE [org.esa.snap]: Unable to open volume_descriptor.xml: null
SEVERE [org.esa.snap]: Unable to open volume_descriptor.xml: null
org.esa.s1tbx.io.ceos.basic.BasicCeosProductReader
[input=F:\XXXXXXXXXX_001001_ALPSRPYYYYYYYYY\VOL-ALPSRPYYYYYYYYY-H1.1__A]:
java.lang.NullPointerException

My machine information is as follows:

System Info:
Product Version = SNAP 201411181905
Operating System = Windows 8 version 6.2 running on amd64
Java; VM; Vendor = 1.8.0_45; Java HotSpot™ 64-Bit Server VM 25.45-b02; Oracle Corporation
Runtime = Java™ SE Runtime Environment 1.8.0_45-b14
Java Home = C:\Program Files\snap\jre
System Locale; Encoding = en_gb (snap); MS932

I have not successfully imported ALOS/ALOS2 data by using S1TBX yet.
Am I missing anything? Or, how can I import ALOS/ALOS2 level 1.1 data?

I’ll check the above problems with the new beta to be released in this week
in which some fixes regarding to ALOS/ALOS2 importer would be applied.

Thanks.
Itaru

lizhee · August 26, 2015, 1:35am

Hi,

     have you fixed the problem of importing PALSAR-2 data?  I have the same problem,  but still unresolved.

Thanks a lot ,
Zhe

orca · August 26, 2015, 7:06am

Hi,

Unfortunately, not yet.
I’d appreciate any info about this problem.

Thanks.
Itaru

lizhee · August 26, 2015, 9:12am

wish this problem can be fixed later.

hlhjsx · August 28, 2015, 1:36am

Hi,
I have the same problem when reading ALOS 2, using the SNAP beta 2.0. I wish this can be fixed soon.
Thanks.

lizhee · September 2, 2015, 3:37pm

wish this be fixed soon too

lveci · September 3, 2015, 2:24am

It is fixed as far as I know

agustan · September 3, 2015, 7:45am

Dear All,
I’ve downloaded and installed SNAP 2.0.6 for MacOS and thanks it works well.
For ALOS-2 Level 1.1 data: importing, radiometric calibration, speckle noise, geometric and polarimetric functions work well.
Only small display error in: Radar–>Radiometric–>Calibrate, tab processing parameter.
Well done, thank you very much and best regards,
agustan

orca · September 7, 2015, 8:23am

Hello:

Thank you very much for your effort! I could import and InSAR ALOS2 data successfully,
and am going to try more data.

Best regards,
Itaru

ramenvjnu · September 18, 2015, 12:24pm

Dear Agustan,
I tried to import ALOS-2 1.1 level full polarimetric data but it shows the following error.
“java.lang.NullpointerException”
I would appreciate if you kindly suggestion me some solution. I am using latest version of SNAP on windows7.

Best
Ram

screyes · October 10, 2015, 12:16pm

Hello,

I am also encountering the same problem with the ALOS CEOS file. I tried loading the same file many times, but still unsuccessful. It gives the same error, the null pointer exception.

I tried a different scene, then it worked.

Now, I don’t know what the real problem is. Can you give some insights about the possible issue?

lveci · October 11, 2015, 1:49pm

What version of the toolbox are you using, what product are you reading and where was it processed from?

ABraun · July 15, 2017, 11:27am

Does anyone know if ALOS-2 ScanSAR1 mode (Observation width 350 km, resolution 100 m) is supported in SNAP?

I don’t want to order images without knowing.

nmorandeira · July 15, 2017, 7:17pm

Hi,

I had the same error while trying to read ALOS/PALSAR-1 products, with the last SNAP version installed in Ubuntu 16.04 LTS 64 bits.

After reading the log message file created by SNAP, I noticed that snap couldn’t find the “LEADER_CEOS.TXT” file, although a “leader_ceos.txt” file was available in the path. So, I renamed the three .txt files (leader_ceos, trailer_ceos and image_ceos) to upper case letters, including the file extension. This solved the problem for me.
I hope this is solved for future versions of SNAP; may be the same problem arises with Mac versions.

Best,
Natalia

secra · October 17, 2022, 2:12pm

Dear @ABraun ,
I also have the same problem now. I want to use a SAR data for estimating biomass and carbon sequestration in a forest area… I couldn’t decide what format of ALOS do I need to buy? I also don’t want to buy that is not supported in SNAP? What would you advice?
Thyank you in advance,

ABraun · October 21, 2022, 10:50am

Level 1.1 CEOS can always be processed in SNAP and you can perform Calibration and Terrain correction on your own. This is no longer possible with Level 2 data therefore I don’t recommend it.