Great South Channel (Georges Bank) Mooring Data collected from January - August, 1997 for the U.S. GLOBEC Georges Bank project (GB project) (NCEI Accession 0277252)
This dataset contains physical data collected on GB GSChannel Mooring during deployment GB_GSChannel_buoy_1 from 1997-01-01 to 1997-08-31. These data include conductivity, depth, salinity calculated from CTD primary sensors, sigma-theta, water pressure, and water temperature. These data were collected by Dr Ronald Schlitz of National Oceanic and Atmospheric Administration as part of the "U.S. GLOBEC Georges Bank (GB)" project and "U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2023-01-23.
The following is the text of the dataset description provided by BCO-DMO:
Great South Channel Mooring Data, Jan. - Aug. 1997
Dataset Description:
Great South Channel Moorings, January to August, 1997
Contact information: Ron Schlitz
NOAA/NMFS/NEFSC
166 Water Street
Woods Hole, MA 02543
508-495-2395
FAX: 508-495-2258
Notes:
Each mooring number below has information relevant to the data.
global attributes: :DATA_ORIGIN = "USGS" ; :MOORING = "4941" ; :DESCRIPT = "VACM-C, GREAT SOUTH CHANNEL SITE 1, CLEAN DATA: NOT SCRUBBED" ; :start_time = "97- I -16 13.33.45" ; :stop_time = "97- III-11 17.11.15" ; :latitude = 40.81667f ; :longitude = -68.15f ; THIS LONGITUDE IS INCORRECT. THE CORRECT LONGITUDE IS -69.15. :magnetic_variation = -17.f ; :sampling_interval = 450 ; :water_depth = 70.f ; :WATER_DEPTH = 70 ; :CREATION_DATE = "10:57 NOV 26,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4831" ; :DESCRIPT = "VACM GLOBEC GREAT SOUTH CHANNEL SITE 2" ; :start_time = "97- I -13 19.33.45" ; :stop_time = "97- VI -20 13.48.45" ; :latitude = 40.85417f ; :longitude = -68.81683f ; :magnetic_variation = -16.f ; :sampling_interval = 450 ; :water_depth = 72.f ; :WATER_DEPTH = 72 ; :CREATION_DATE = "10:07 DEC 2,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4832" ; :DESCRIPT = "VACM-C, GREAT SOUTH CHANNEL SITE 2, COMPASS TROUBLE STARTED " ; :start_time = "97- I -13 19.33.45" ; :stop_time = "97- III-27 07.11.15" ; :latitude = 40.85417f ; :longitude = -68.81683f ; :magnetic_variation = -16.f ; :sampling_interval = 450 ; :water_depth = 72.f ; :WATER_DEPTH = 72 ; :CREATION_DATE = "16:54 DEC 1,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4821" ; :DESCRIPT = "SEACAT, GREAT SOUTH CHANNEL SITE 3. CLEAN DATA, NOT SCRUBBE" ; :start_time = "97- I -13 16.35.00" ; :stop_time = "97- VI -20 17.25.00" ; :latitude = 40.8625f ; :longitude = -68.66683f ; :magnetic_variation = 0.f ; :sampling_interval = 600 ; :water_depth = 62.f ; :WATER_DEPTH = 62 ; :CREATION_DATE = "10:40 NOV 25,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4871" ; :DESCRIPT = "VMCM SITE 4 GREAT SOUTH CHANNEL. MANY WILD POINTS SCRUBBED. " ; :start_time = "97- I -14 20.31.52" ; :stop_time = "97- II -09 08.28.07" ; :latitude = 40.867f ; :longitude = -68.51017f ; :magnetic_variation = -16.56f ; :sampling_interval = 225 ; :water_depth = 52.f ; :WATER_DEPTH = 52 ; :CREATION_DATE = "15:10 MAR 7,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4921" ; :DESCRIPT = "SEACAT, GREAT SOUTH CHANNEL SITE 5. CLEAN DATA, NOT SCRUBBE" ; :start_time = "97- I -15 23.35.00" ; :stop_time = "97-VIII-20 17.25.00" ; :latitude = 40.71583f ; :longitude = -68.40667f ; :magnetic_variation = 0.f ; :sampling_interval = 600 ; :water_depth = 61.f ; :WATER_DEPTH = 61 ; :CREATION_DATE = "10:57 NOV 25,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4931" ; :DESCRIPT = "VACM-C, GREAT SOUTH CHANNEL SITE 6, CLEAN DATA: NOT SCRUBBED" ; :start_time = "97- I -16 03.33.45" ; :stop_time = "97-VIII-17 18.18.45" ; :latitude = 40.62683f ; :longitude = -68.356f ; :magnetic_variation = -17.f ; :sampling_interval = 450 ; :water_depth = 80.f ; :WATER_DEPTH = 80 ; :CREATION_DATE = "13:08 NOV 26,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4933" ; :DESCRIPT = "AANDERAA GREAT SOUTH CHANNEL SITE 6" ; :start_time = "97- I -16 04.41.00" ; :stop_time = "97- V -17 00.01.00" ; :latitude = 40.62683f ; :longitude = -68.356f ; :magnetic_variation = -17.f ; :sampling_interval = 1200 ; :water_depth = 80.f ; :WATER_DEPTH = 80 ; :CREATION_DATE = "13:26 DEC 10,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4901" ; :DESCRIPT = "VACM-C, GREAT SOUTH CHANNEL SITE 7, CLEAN DATA: NOT SCRUBBED" ; :start_time = "97- I -15 19.33.45" ; :stop_time = "97-VIII-17 09.56.15" ; :latitude = 40.51683f ; :longitude = -68.28616f ; :magnetic_variation = -17.f ; :sampling_interval = 450 ; :water_depth = 101.f ; :WATER_DEPTH = 101 ; :CREATION_DATE = "09:13 DEC 1,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4902" ; :DESCRIPT = "VACM GLOBEC GREAT SOUTH CHANNEL SITE 7" ; :start_time = "97- I -15 19.33.45" ; :stop_time = "97-VIII-17 09.26.15" ; :latitude = 40.51683f ; :longitude = -68.28616f ; :magnetic_variation = -17.f ; :sampling_interval = 450 ; :water_depth = 101.f ; :WATER_DEPTH = 101 ; :CREATION_DATE = "13:33 DEC 5,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4903" ; :DESCRIPT = "AANDERAA GREAT SOUTH CHANNEL SITE 7. CLEAN DATA, NOT SCRUBB" ; :start_time = "97- I -15 23.41.00" ; :stop_time = "97- V -14 00.21.00" ; :latitude = 40.51683f ; :longitude = -68.28616f ; :magnetic_variation = -16.f ; :sampling_interval = 1200 ; :water_depth = 101.f ; :WATER_DEPTH = 101 ; :CREATION_DATE = "13:53 DEC 10,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4892" ; :DESCRIPT = "MX-VACM, GREAT SOUTH CHANNEL SITE 8. NO ROTOR, MOORING FELL" ; :start_time = "97- I -15 16.33.45" ; :stop_time = "97- II -11 22.26.15" ; :latitude = 40.24533f ; :longitude = -68.17f ; :magnetic_variation = -16.5f ; :sampling_interval = 450 ; :water_depth = 325.f ; :WATER_DEPTH = 325 ; :CREATION_DATE = "16:31 FEB 6,\'98" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4893" ; :DESCRIPT = "AANDERAA GREAT SOUTH CHANNEL SITE 8. MOORING FELL 2/12. " ; :start_time = "97- I -15 15.42.00" ; :stop_time = "97- II -12 01.42.00" ; :latitude = 40.24533f ; :longitude = -68.17f ; :magnetic_variation = -16.f ; :sampling_interval = 1200 ; :water_depth = 325.f ; :WATER_DEPTH = 325 ; :CREATION_DATE = "13:51 DEC 10,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4894" ; :DESCRIPT = "AANDERAA GREAT SOUTH CHANNEL SITE 8. MOORING FELL 2/12." ; :start_time = "97- I -15 16.40.00" ; :stop_time = "97- II -12 01.40.00" ; :latitude = 40.24533f ; :longitude = -68.17f ; :magnetic_variation = -16.f ; :sampling_interval = 1200 ; :water_depth = 325.f ; :WATER_DEPTH = 325 ; :CREATION_DATE = "13:47 DEC 10,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4841" ; :DESCRIPT = "VACM GLOBEC GREAT SOUTH CHANNEL SITE 9" ; :start_time = "97- I -14 00.33.45" ; :stop_time = "97- VI -21 22.48.45" ; :latitude = 40.70033f ; :longitude = -68.67533f ; :magnetic_variation = -16.f ; :sampling_interval = 450 ; :water_depth = 61.f ; :WATER_DEPTH = 61 ; :CREATION_DATE = "11:06 DEC 2,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
The following is the text of the dataset description provided by BCO-DMO:
Great South Channel Mooring Data, Jan. - Aug. 1997
Dataset Description:
Great South Channel Moorings, January to August, 1997
Contact information: Ron Schlitz
NOAA/NMFS/NEFSC
166 Water Street
Woods Hole, MA 02543
508-495-2395
FAX: 508-495-2258
Notes:
Each mooring number below has information relevant to the data.
global attributes: :DATA_ORIGIN = "USGS" ; :MOORING = "4941" ; :DESCRIPT = "VACM-C, GREAT SOUTH CHANNEL SITE 1, CLEAN DATA: NOT SCRUBBED" ; :start_time = "97- I -16 13.33.45" ; :stop_time = "97- III-11 17.11.15" ; :latitude = 40.81667f ; :longitude = -68.15f ; THIS LONGITUDE IS INCORRECT. THE CORRECT LONGITUDE IS -69.15. :magnetic_variation = -17.f ; :sampling_interval = 450 ; :water_depth = 70.f ; :WATER_DEPTH = 70 ; :CREATION_DATE = "10:57 NOV 26,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4831" ; :DESCRIPT = "VACM GLOBEC GREAT SOUTH CHANNEL SITE 2" ; :start_time = "97- I -13 19.33.45" ; :stop_time = "97- VI -20 13.48.45" ; :latitude = 40.85417f ; :longitude = -68.81683f ; :magnetic_variation = -16.f ; :sampling_interval = 450 ; :water_depth = 72.f ; :WATER_DEPTH = 72 ; :CREATION_DATE = "10:07 DEC 2,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4832" ; :DESCRIPT = "VACM-C, GREAT SOUTH CHANNEL SITE 2, COMPASS TROUBLE STARTED " ; :start_time = "97- I -13 19.33.45" ; :stop_time = "97- III-27 07.11.15" ; :latitude = 40.85417f ; :longitude = -68.81683f ; :magnetic_variation = -16.f ; :sampling_interval = 450 ; :water_depth = 72.f ; :WATER_DEPTH = 72 ; :CREATION_DATE = "16:54 DEC 1,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4821" ; :DESCRIPT = "SEACAT, GREAT SOUTH CHANNEL SITE 3. CLEAN DATA, NOT SCRUBBE" ; :start_time = "97- I -13 16.35.00" ; :stop_time = "97- VI -20 17.25.00" ; :latitude = 40.8625f ; :longitude = -68.66683f ; :magnetic_variation = 0.f ; :sampling_interval = 600 ; :water_depth = 62.f ; :WATER_DEPTH = 62 ; :CREATION_DATE = "10:40 NOV 25,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4871" ; :DESCRIPT = "VMCM SITE 4 GREAT SOUTH CHANNEL. MANY WILD POINTS SCRUBBED. " ; :start_time = "97- I -14 20.31.52" ; :stop_time = "97- II -09 08.28.07" ; :latitude = 40.867f ; :longitude = -68.51017f ; :magnetic_variation = -16.56f ; :sampling_interval = 225 ; :water_depth = 52.f ; :WATER_DEPTH = 52 ; :CREATION_DATE = "15:10 MAR 7,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4921" ; :DESCRIPT = "SEACAT, GREAT SOUTH CHANNEL SITE 5. CLEAN DATA, NOT SCRUBBE" ; :start_time = "97- I -15 23.35.00" ; :stop_time = "97-VIII-20 17.25.00" ; :latitude = 40.71583f ; :longitude = -68.40667f ; :magnetic_variation = 0.f ; :sampling_interval = 600 ; :water_depth = 61.f ; :WATER_DEPTH = 61 ; :CREATION_DATE = "10:57 NOV 25,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4931" ; :DESCRIPT = "VACM-C, GREAT SOUTH CHANNEL SITE 6, CLEAN DATA: NOT SCRUBBED" ; :start_time = "97- I -16 03.33.45" ; :stop_time = "97-VIII-17 18.18.45" ; :latitude = 40.62683f ; :longitude = -68.356f ; :magnetic_variation = -17.f ; :sampling_interval = 450 ; :water_depth = 80.f ; :WATER_DEPTH = 80 ; :CREATION_DATE = "13:08 NOV 26,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4933" ; :DESCRIPT = "AANDERAA GREAT SOUTH CHANNEL SITE 6" ; :start_time = "97- I -16 04.41.00" ; :stop_time = "97- V -17 00.01.00" ; :latitude = 40.62683f ; :longitude = -68.356f ; :magnetic_variation = -17.f ; :sampling_interval = 1200 ; :water_depth = 80.f ; :WATER_DEPTH = 80 ; :CREATION_DATE = "13:26 DEC 10,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4901" ; :DESCRIPT = "VACM-C, GREAT SOUTH CHANNEL SITE 7, CLEAN DATA: NOT SCRUBBED" ; :start_time = "97- I -15 19.33.45" ; :stop_time = "97-VIII-17 09.56.15" ; :latitude = 40.51683f ; :longitude = -68.28616f ; :magnetic_variation = -17.f ; :sampling_interval = 450 ; :water_depth = 101.f ; :WATER_DEPTH = 101 ; :CREATION_DATE = "09:13 DEC 1,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4902" ; :DESCRIPT = "VACM GLOBEC GREAT SOUTH CHANNEL SITE 7" ; :start_time = "97- I -15 19.33.45" ; :stop_time = "97-VIII-17 09.26.15" ; :latitude = 40.51683f ; :longitude = -68.28616f ; :magnetic_variation = -17.f ; :sampling_interval = 450 ; :water_depth = 101.f ; :WATER_DEPTH = 101 ; :CREATION_DATE = "13:33 DEC 5,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4903" ; :DESCRIPT = "AANDERAA GREAT SOUTH CHANNEL SITE 7. CLEAN DATA, NOT SCRUBB" ; :start_time = "97- I -15 23.41.00" ; :stop_time = "97- V -14 00.21.00" ; :latitude = 40.51683f ; :longitude = -68.28616f ; :magnetic_variation = -16.f ; :sampling_interval = 1200 ; :water_depth = 101.f ; :WATER_DEPTH = 101 ; :CREATION_DATE = "13:53 DEC 10,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4892" ; :DESCRIPT = "MX-VACM, GREAT SOUTH CHANNEL SITE 8. NO ROTOR, MOORING FELL" ; :start_time = "97- I -15 16.33.45" ; :stop_time = "97- II -11 22.26.15" ; :latitude = 40.24533f ; :longitude = -68.17f ; :magnetic_variation = -16.5f ; :sampling_interval = 450 ; :water_depth = 325.f ; :WATER_DEPTH = 325 ; :CREATION_DATE = "16:31 FEB 6,\'98" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ; :DATA_ORIGIN = "USGS" ; :MOORING = "4893" ; :DESCRIPT = "AANDERAA GREAT SOUTH CHANNEL SITE 8. MOORING FELL 2/12. " ; :start_time = "97- I -15 15.42.00" ; :stop_time = "97- II -12 01.42.00" ; :latitude = 40.24533f ; :longitude = -68.17f ; :magnetic_variation = -16.f ; :sampling_interval = 1200 ; :water_depth = 325.f ; :WATER_DEPTH = 325 ; :CREATION_DATE = "13:51 DEC 10,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4894" ; :DESCRIPT = "AANDERAA GREAT SOUTH CHANNEL SITE 8. MOORING FELL 2/12." ; :start_time = "97- I -15 16.40.00" ; :stop_time = "97- II -12 01.40.00" ; :latitude = 40.24533f ; :longitude = -68.17f ; :magnetic_variation = -16.f ; :sampling_interval = 1200 ; :water_depth = 325.f ; :WATER_DEPTH = 325 ; :CREATION_DATE = "13:47 DEC 10,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
:DATA_ORIGIN = "USGS" ; :MOORING = "4841" ; :DESCRIPT = "VACM GLOBEC GREAT SOUTH CHANNEL SITE 9" ; :start_time = "97- I -14 00.33.45" ; :stop_time = "97- VI -21 22.48.45" ; :latitude = 40.70033f ; :longitude = -68.67533f ; :magnetic_variation = -16.f ; :sampling_interval = 450 ; :water_depth = 61.f ; :WATER_DEPTH = 61 ; :CREATION_DATE = "11:06 DEC 2,\'97" ; :DATA_TYPE = "TIME" ; :COORD_SYSTEM = "GEOGRAPHICAL" ;
Dataset Citation
- Cite as: Schlitz, Ronald (2023). Great South Channel (Georges Bank) Mooring Data collected from January - August, 1997 for the U.S. GLOBEC Georges Bank project (GB project) (NCEI Accession 0277252). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0277252. Accessed [date].
Dataset Identifiers
ISO 19115-2 Metadata
gov.noaa.nodc:0277252
Download Data |
|
Distribution Formats |
|
Ordering Instructions | Contact NCEI for other distribution options and instructions. |
Distributor |
NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov |
Dataset Point of Contact |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Time Period | 1997-01-01 to 1997-08-31 |
Spatial Bounding Box Coordinates |
West: -69.15
East: -68.17
South: 40.2453
North: 40.8673
|
Spatial Coverage Map |
General Documentation |
|
Associated Resources |
|
Publication Dates |
|
Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns |
Dataset Progress Status | Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility |
Data Update Frequency | As needed |
Purpose | This dataset is available to the public for a wide variety of uses including scientific research and analysis. |
Use Limitations |
|
Dataset Citation |
|
Cited Authors | |
Principal Investigators | |
Contributors | |
Resource Providers | |
Points of Contact | |
Publishers | |
Acknowledgments |
|
Theme keywords |
NODC DATA TYPES THESAURUS
NODC OBSERVATION TYPES THESAURUS
WMO_CategoryCode
|
Data Center keywords | NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords |
Platform keywords | BCO-DMO Platform Names Global Change Master Directory (GCMD) Platform Keywords |
Place keywords | Provider Place Names |
Project keywords |
NODC PROJECT NAMES THESAURUS
BCO-DMO Standard Programs
BCO-DMO Standard Projects
Global Change Master Directory (GCMD) Project Keywords
Provider Deployment IDs
Provider Funding Award Information
|
Keywords | NCEI ACCESSION NUMBER |
Use Constraints |
|
Data License | |
Access Constraints |
|
Fees |
|
Lineage information for: dataset | |
---|---|
Processing Steps |
|
Output Datasets |
|
Last Modified: 2023-10-31T17:37:07Z
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov