CMorph ds502.0 - Revision history

Admin: /* Java Daily Accumulation */

2017-02-09T14:57:39Z

Java Daily Accumulation

← Older revision		Revision as of 16:57, 9 February 2017
Line 82:		Line 82:

	} else {		} else {
	for (int i=0; i<691200; i++) Ignore -9999 (no data) - and 3.0* is for 3-hrly mm/hr		for (int i=0; i<691200; i++) // Ignore -9999 (no data) - and 3.0* is for 3-hrly mm/hr
	data[i]+=(3.0*Math.max(0,dis.readFloat()));		data[i]+=(3.0*Math.max(0,dis.readFloat()));
	}		}

Admin: /* Java Daily Accumulation */

2017-02-09T14:57:20Z

Java Daily Accumulation

← Older revision		Revision as of 16:57, 9 February 2017
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	}		}
	}		}
			dis.close();
	</nowiki>		</nowiki>

	== Citation ==		== Citation ==
	Climate Prediction Center/National Centers for Environmental Prediction/National Weather Service/NOAA/U.S. Department of Commerce. 2011, updated daily. NOAA CPC Morphing Technique (CMORPH) Global Precipitation Analyses. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://doi.org/10.5065/D6CZ356W. Accessed† dd mmm yyyy.		Climate Prediction Center/National Centers for Environmental Prediction/National Weather Service/NOAA/U.S. Department of Commerce. 2011, updated daily. NOAA CPC Morphing Technique (CMORPH) Global Precipitation Analyses. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://doi.org/10.5065/D6CZ356W. Accessed† dd mmm yyyy.

Admin: /* Java Daily Accumulation */

2017-02-09T13:57:28Z

Java Daily Accumulation

← Older revision		Revision as of 15:57, 9 February 2017
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	== Example Code ==		== Example Code ==
	=== Java Daily Accumulation ===		=== Java Daily Accumulation ===
	Here's Java code to calculate daily precipitation, by summing the CPCs.		Here's Java code to calculate daily precipitation (CPC), by summing the CPCs.
			<nowiki>
	DataInputStream dis = new DataInputStream(new BufferedInputStream(new FileInputStream(new File(infile))));		DataInputStream dis = new DataInputStream(new BufferedInputStream(new FileInputStream(new File(infile))));
	float[] data = new float[691200];		float[] data = new float[691200];
Line 82:		Line 82:

	} else {		} else {
	for (int i=0; i<691200; i++)		for (int i=0; i<691200; i++) Ignore -9999 (no data) - and 3.0* is for 3-hrly mm/hr
	data[i]+=(3.0*Math.max(0,dis.readFloat()));		data[i]+=(3.0*Math.max(0,dis.readFloat()));
			}
			}
			</nowiki>




	== Citation ==		== Citation ==
	Climate Prediction Center/National Centers for Environmental Prediction/National Weather Service/NOAA/U.S. Department of Commerce. 2011, updated daily. NOAA CPC Morphing Technique (CMORPH) Global Precipitation Analyses. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://doi.org/10.5065/D6CZ356W. Accessed† dd mmm yyyy.		Climate Prediction Center/National Centers for Environmental Prediction/National Weather Service/NOAA/U.S. Department of Commerce. 2011, updated daily. NOAA CPC Morphing Technique (CMORPH) Global Precipitation Analyses. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://doi.org/10.5065/D6CZ356W. Accessed† dd mmm yyyy.

Admin at 13:55, 9 February 2017

2017-02-09T13:55:28Z

@@ Line 7: / Line 7: @@
 Sign up at http://rda.ucar.edu for free user account. You can then browse through all their data, tick boxes for what you want, and download a perl script that will then download your data. Edit the perl script so that it knows your password, and run it with something like '''perl download.pl'''. I use Strawberry Perl. You'll also need wget.exe in the same folder. Note that on 2015/10/28, the filename convention changed.
-== Data Details ==
 {| class="wikitable"
@@ Line 28: / Line 30: @@
 ! style="text-align:right;" scope="col"| Data 2 / units:
 | style="text-align:left;" | COMB - Merged Microwave precipitation (mm per hour)
 |}
 According to the readme, these files are compressed, however, I found that not to be true; they were all uncompressed, same-length files. The binary files are ordered in blocks for each 3-hourly reading. Each block is a 1440x480 grid of 4-byte floats, MSB-first (i.e. it reads trivially into Java, but you'll need to flip the byte order for LSB-first languages like C). The ordering of the grid starts at the Northern-Western most point, and then moves East first, repeating for each latitude.
@@ Line 64: / Line 67: @@
 | style="text-align:left;" | 2100-2400hrs
 |}
 == Citation ==
 Climate Prediction Center/National Centers for Environmental Prediction/National Weather Service/NOAA/U.S. Department of Commerce. 2011, updated daily. NOAA CPC Morphing Technique (CMORPH) Global Precipitation Analyses. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://doi.org/10.5065/D6CZ356W. Accessed† dd mmm yyyy.

Admin: /* File Format */

2017-02-09T13:32:47Z

File Format

← Older revision		Revision as of 15:32, 9 February 2017
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	== File Format ==		== File Format ==

	The binary files is ordered in blocks for each 3-hourly reading. Each block is a 1440x480 grid of 4-byte floats, MSB-first (i.e. it reads trivially into Java, but you'll need to flip the byte order for LSB-first languages like C). The ordering of the grid starts at the Northern-Western most point, and then moves East first, repeating for each latitude.		According to the readme, these files are compressed, however, I found that not to be true; they were all uncompressed, same-length files. The binary files are ordered in blocks for each 3-hourly reading. Each block is a 1440x480 grid of 4-byte floats, MSB-first (i.e. it reads trivially into Java, but you'll need to flip the byte order for LSB-first languages like C). The ordering of the grid starts at the Northern-Western most point, and then moves East first, repeating for each latitude.

	{\| class="wikitable"		{\| class="wikitable"
Line 64:		Line 64:
	\| style="text-align:left;" \| 2100-2400hrs		\| style="text-align:left;" \| 2100-2400hrs
	\|}		\|}


	== Citation ==		== Citation ==
	Climate Prediction Center/National Centers for Environmental Prediction/National Weather Service/NOAA/U.S. Department of Commerce. 2011, updated daily. NOAA CPC Morphing Technique (CMORPH) Global Precipitation Analyses. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://doi.org/10.5065/D6CZ356W. Accessed† dd mmm yyyy.		Climate Prediction Center/National Centers for Environmental Prediction/National Weather Service/NOAA/U.S. Department of Commerce. 2011, updated daily. NOAA CPC Morphing Technique (CMORPH) Global Precipitation Analyses. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://doi.org/10.5065/D6CZ356W. Accessed† dd mmm yyyy.

Admin: /* Geometry */

2017-02-09T13:21:57Z

Geometry

@@ Line 1: / Line 1: @@
-== Geometry ==
+== About ==
 {| class="wikitable"
@@ Line 14: / Line 22: @@
 ! style="text-align:right;" scope="col"| Latitude range of first pixel
 | style="text-align:left;" | 59.75&ordm;N - 60.0&ordm;N
 |}

Admin: Created page with "== Geometry == {| class="wikitable" |- ! style="text-align:right;" scope="col" | Pixel resolution | style="text-align:left;" | 1440 x 480 |- ! style="text-align:right;" scope..."

2017-02-09T12:29:46Z

Created page with "== Geometry == {| class="wikitable" |- ! style="text-align:right;" scope="col" | Pixel resolution | style="text-align:left;" | 1440 x 480 |- ! style="text-align:right;" scope..."

New page

== Geometry ==

{| class="wikitable"
|-
! style="text-align:right;" scope="col" | Pixel resolution
| style="text-align:left;" | 1440 x 480
|-
! style="text-align:right;" scope="col"| Geographical resolution
| style="text-align:left;" | 0.25º x 0.25º
|-
! style="text-align:right;" scope="col"| Longitude range of first pixel
| style="text-align:left;" | 0.0ºE - 0.25ºE
|-
! style="text-align:right;" scope="col"| Latitude range of first pixel
| style="text-align:left;" | 59.75ºN - 60.0ºN

|}