• In mid-April 2025, the “Order Files” option of NSIDC DAAC’s Data Access Tool will be retired and replaced with Earthdata Download. Earthdata Download is a native desktop application that enables efficient direct download for orders of any size. To use this new download option, you must install the new version release of Earthdata Download (v1.0.4) available here: https://nasa.github.io/earthdata-download/.
    Additionally, the “Order History” page (https://nsidc.org/order-history) will also be removed two weeks after this update, at the end of April 2025.

Data Access Tool

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Selected Data Set Information

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Data Set:
ATLAS/ICESat-2 L3B Daily and Monthly Gridded Polar Sea Surface Height Anomaly, Version 3
Data Set ID:
ATL21
Data Set Summary:
ATL21 contains daily and monthly gridded polar sea surface height (SSH) anomalies, derived from the along-track ATLAS/ICESat-2 L3A Sea Ice Height product (ATL10, V6). The ATL10 product identifies leads in sea ice and establishes a reference sea surface used to estimate SSH in 10 km along-track segments. ATL21 aggregates the ATL10 along-track SSH estimates and computes daily and monthly gridded SSH anomaly in NSIDC Polar Stereographic Northern and Southern Hemisphere 25 km grids.

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    CesiumNSIDC Data Access UI v2.0.0
    146 files selected (~540 MB)
    '*' match multiple characters; '?' match one character; ',' combine queries; Example: *2019??01*,*2020??01*
    File Name
    Size (MB)
    Start Time
    End Time
    ATL21-02_20241001001458_02252501_003_01.h53.32024-10-01 01:19:052024-11-01 00:51:18
    ATL21-01_20241001001458_02252501_003_01.h53.92024-10-01 00:36:342024-11-01 00:01:31
    ATL21-02_20240901003024_11542401_003_01.h53.32024-09-01 01:34:492024-09-30 23:58:31
    ATL21-01_20240901003024_11542401_003_01.h53.92024-09-01 00:51:452024-09-30 23:05:43
    ATL21-02_20240801011119_06812401_003_01.h53.42024-08-01 03:49:582024-09-01 00:13:43
    ATL21-01_20240801011119_06812401_003_01.h53.82024-08-01 01:32:142024-08-31 23:21:41
    ATL21-02_20240701001824_02072401_003_01.h53.42024-07-01 01:21:182024-07-31 23:20:19
    ATL21-01_20240701001824_02072401_003_01.h54.22024-07-01 00:36:332024-07-31 22:28:16
    ATL21-01_20240601002639_11362301_003_01.h52.82024-06-22 01:18:142024-06-30 23:10:01
    ATL21-02_20240601002639_11362301_003_01.h52.02024-06-22 00:29:552024-07-01 00:00:31
    ATL21-02_20240501011434_06632301_003_01.h52.02024-05-01 05:26:372024-05-10 04:58:10
    ATL21-01_20240501011434_06632301_003_01.h52.72024-05-01 01:31:082024-05-10 05:38:05
    ATL21-02_20240401012953_02052301_003_01.h53.02024-04-01 05:44:162024-05-01 00:55:42
    ATL21-01_20240401012953_02052301_003_01.h54.62024-04-01 01:48:262024-05-01 00:06:50
    ATL21-02_20240301003635_11182201_003_01.h52.92024-03-01 04:58:592024-03-31 23:37:01
    ATL21-01_20240301003635_11182201_003_01.h54.52024-03-01 00:54:192024-04-01 00:24:24
    ATL21-02_20240201002628_06752201_003_01.h52.82024-02-01 09:23:432024-02-29 08:26:46
    ATL21-01_20240201002628_06752201_003_01.h54.12024-02-01 00:41:032024-02-29 23:28:40
    ATL21-02_20240101010740_02022201_003_01.h53.02024-01-01 10:06:142024-01-31 22:33:22
    ATL21-01_20240101010740_02022201_003_01.h54.52024-01-01 01:23:552024-01-31 23:19:57
    ATL21-02_20231201001420_11152101_003_01.h53.12023-12-01 01:18:122024-01-01 00:50:30
    ATL21-01_20231201001420_11152101_003_01.h54.32023-12-01 00:35:532024-01-01 00:01:42
    ATL21-02_20231101002945_06572101_003_01.h53.32023-11-01 03:07:572023-11-30 22:23:48
    ATL21-01_20231101002945_06572101_003_01.h54.32023-11-01 00:47:402023-11-30 23:09:03
    ATL21-02_20231001011039_01842101_003_01.h53.42023-10-01 02:15:052023-11-01 00:13:32
    ATL21-01_20231001011039_01842101_003_01.h54.12023-10-01 01:30:552023-10-31 23:23:28
    ATL21-02_20230901012603_11132001_003_02.h53.32023-09-01 02:30:552023-10-01 00:54:57
    ATL21-01_20230901012603_11132001_003_02.h53.82023-09-01 01:46:422023-10-01 00:02:44
    ATL21-02_20230801003256_06392001_003_02.h53.52023-08-01 01:38:472023-09-01 01:10:19
    ATL21-01_20230801003256_06392001_003_02.h54.12023-08-01 00:54:062023-09-01 00:18:28
    ATL21-02_20230701011405_01662001_003_02.h53.42023-07-01 02:17:592023-07-31 22:42:04
    ATL21-01_20230701011405_01662001_003_02.h54.42023-07-01 01:35:152023-07-31 23:26:23
    ATL21-01_20230601012940_10951901_003_02.h54.42023-06-01 03:25:592023-07-01 00:08:48
    ATL21-02_20230601012940_10951901_003_02.h53.22023-06-01 02:34:012023-07-01 00:57:49
    ATL21-02_20230501003631_06211901_003_02.h53.22023-05-01 03:16:062023-05-31 23:38:10
    ATL21-01_20230501003631_06211901_003_02.h54.32023-05-01 00:57:392023-06-01 00:28:16
    ATL21-02_20230401005159_01631901_003_02.h53.12023-04-01 02:08:402023-04-30 22:44:49
    ATL21-01_20230401005159_01631901_003_02.h54.62023-04-01 01:11:042023-04-30 23:33:42
    ATL21-02_20230301013253_10771801_003_02.h53.02023-03-01 02:39:212023-04-01 00:24:07
    ATL21-01_20230301013253_10771801_003_02.h54.62023-03-01 01:47:022023-03-31 23:44:09
    ATL21-02_20230201005656_06491801_003_02.h52.82023-02-01 02:03:152023-03-01 01:06:09
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    ATL21-01_20220601002454_10681501_003_01.h54.32022-06-01 00:45:192022-06-30 23:02:04
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    ATL21-01_20190701002805_00450401_003_01.h52.72019-07-25 20:25:182019-08-01 00:14:17
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    ATL21-01_20190601004327_09740301_003_01.h54.02019-06-01 01:04:372019-06-26 13:59:53
    ATL21-02_20190501012431_05010301_003_01.h53.22019-05-01 04:03:402019-06-01 00:15:31
    ATL21-01_20190501012431_05010301_003_01.h54.32019-05-01 01:42:292019-05-31 23:38:00
    ATL21-02_20190401000537_00420301_003_01.h53.02019-04-01 01:11:242019-05-01 01:07:21
    ATL21-01_20190401000537_00420301_003_01.h54.42019-04-01 00:26:042019-05-01 00:22:17
    ATL21-02_20190301004639_09560201_003_01.h53.02019-03-01 13:00:542019-03-31 22:14:02
    ATL21-01_20190301004639_09560201_003_01.h54.42019-03-01 01:06:032019-03-31 22:56:25
    ATL21-02_20190201001042_05280201_003_01.h52.82019-02-01 01:15:032019-03-01 00:18:26
    ATL21-01_20190201001042_05280201_003_01.h54.22019-02-01 00:23:222019-02-28 23:37:39
    ATL21-02_20190101005132_00550201_003_01.h53.02019-01-01 01:55:492019-01-31 23:52:21
    ATL21-01_20190101005132_00550201_003_01.h54.52019-01-01 01:07:292019-01-31 23:02:14
    ATL21-02_20181201013224_09690101_003_01.h53.22018-12-01 02:35:212019-01-01 00:33:54
    ATL21-01_20181201013224_09690101_003_01.h54.42018-12-01 01:50:512018-12-31 23:43:04
    ATL21-02_20181101001332_05100101_003_01.h53.22018-11-01 02:53:022018-12-01 01:15:13
    ATL21-01_20181101001332_05100101_003_01.h54.22018-11-01 02:07:532018-12-01 00:23:21
    ATL21-02_20181001010615_00370101_003_01.h52.52018-10-14 01:06:152018-10-31 23:56:14
    ATL21-01_20181001010615_00370101_003_01.h53.22018-10-14 00:21:482018-10-31 23:05:09
    146 files selected (~540 MB)
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