First ISCCP Regional Experiment (FIRE) Cirrus 2 University of North Dakota Citation Aircraft Langley DAAC Data Set Document
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First ISCCP Regional Experiment (FIRE) Cirrus 2 University of North Dakota Citation Aircraft Langley DAAC Data Set Document |
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The First ISCCP Regional Experiments have been designed to improve data products and cloud/radiation parameterizations used in general circulation models (GCMS). Specifically, the goals of FIRE are (1) to improve basic understanding of the interaction of physical processes in determining life cycles of cirrus and marine stratocumulus systems and the radiative properties of these clouds during their life cycles and (2) to investigate the interrelationships between the ISCCP data, GCM parameterizations, and higher space and time resolution cloud data.
To-date, four intensive field-observation periods were planned and executed: a cirrus IFO (October 13-November 2, 1986); a marine stratocumulus IFO off the southwestern coast of California (June 29-July 20, 1987) a second cirrus IFO in southeastern Kansas (November 13-December 7, 1991); and a second marine stratocumulus IFO in the eastern North Atlantic Ocean (June 1-June 28, 1992). Each mission combined coordinated satellite, airborne, and surface observations with modeling studies to investigate the cloud properties and physical processes of the cloud system.
All data sets discussed in this document were produced by University of North Dakota. These data sets are:
| FIRE_CI2_CITATN_1HZ: | First ISCCP Regional Experiment (FIRE) Cirrus 2 University of North Dakota Citation Aircraft 1 Hertz Data (FIRE_CI2_CITATN_1HZ) |
| FIRE_CI2_CITATN_PMS: | First ISCCP Regional Experiment (FIRE) Cirrus 2 University of North Dakota Citation Aircraft Particle Measuring System Probe Data (FIRE_CI2_CITATN_PMS) |
| FIRE_CI2_CITATN_5SEC: | First ISCCP Regional Experiment (FIRE) Cirrus 2 University of North Dakota Citation Aircraft 5-Second Data (FIRE_CI2_CITATN_5SEC) |
| FIRE_CI2_CITATN_IWC: | First ISCCP Regional Experiment (FIRE) Cirrus 2 University of North Dakota Citation Aircraft Ice Water Content Data (FIRE_CI2_CITATN_IWC) |
| FIRE_CI2_CITATN_24HZ: | First ISCCP Regional Experiment (FIRE) Cirrus 2 University of North Dakota Citation Aircraft 24 Hertz Data (FIRE_CI2_CITATN_24HZ) |
The University of North Dakota owns and operates a Cessna Citation II aircraft (N77ND) for the purpose of atmospheric research. This aircraft type has a number of design and performance characteristics which make it an ideal platform for a wide range of atmospheric studies. A series of structural modifications have been made to the basic airplane. These include the following: pylons under the wing tips for a variety of probes in the undisturbed air flow away from the fuselage; a nose boom for wind measurement; a heated radome to prevent ice accumulation on the nose area; special mounts for upward and downward looking radiometers; side-facing camera mounts for time-lapse cameras; optically-flat glass windows for photography; and an air inlet port for air sampling inside the pressurized cabin. The research instrumentation available on the Citation for the second Cirrus IFO is described below.
The basic instrumentation package measured temperature, dew point temperature, pressure, wind and cloud microphysical characteristics along with aircraft position, altitude and performance parameters. The three-dimensional wind field is derived from measurements of acceleration, pitch, roll and yaw combined with angles of attack and sideslip and indicated airspeed. The aircraft parameters were supplied by an LTN-76 inertial navigation system and a Global Positioning System (GPS). Turbulence intensity can be derived from differential pressure transducers and INS accelerometer outputs.
Cloud microphysics were sampled with PMS 1D-P, 2D-C, 1D-C and FSSP probes, and a continuous formvar replicator from DRI. A number of gas and aerosol sampling instruments were available. These included fast response O3 and NO2 monitors and a condensation nuclei counter.
A forward-looking video camera was used to provide a visual record of flight conditions. The data were sampled at various rates from 1 to 24 sec-1. The sampling is controlled by the on-board computer system which also displayed the data in real time in graphic and alphanumeric formats while recording them on magnetic tape.
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| FIRE_CI2_CITATN_1HZ | Air Flow Angle Condensation Nuclei Dew/Front Point Temperature Liquid Water Content Nitrogen Dioxide Ozone Pressure Supercooled Liq. Water Content Temperature Wind Direction Wind Speed |
| FIRE_CI2_CITATN_PMS | Clouds |
| FIRE_CI2_CITATN_5SEC | Barometric Altitude Cloud Ice Cloud Particles Condensation Nuclei Condensation Nuclei Flow Rate Condensation Nuclei Temp Dew/Frost Point Temperature Ice Water Content Liquid Water Content Mixing Ratio Nitrogen Dioxide Ozone Potential Temperature Relative Humidity Reverse Flow Temperature Static Pressure Temperature Vapor Pressure Vertical Velocity Vertical Wind Acceleration Vertical Wind Angle Vertical Wind Speed Virtual Temperature Wind Direction Wind Speed |
| FIRE_CI2_CITATN_IWC | Ambient Temperature Barometric Altitude Dew/Frost Point Temperature Diffusional Growth Rate Ice Water Content Particle Diameter Particle Number Concentration Precipitation Rate Radar Reflectivity Relative Humidity Static Pressure Vertical Velocity Water Vapor Density |
| FIRE_CI2_CITATN_24HZ | Static Pressure Temperature Vertical Wind Acceleration Vertical Wind Speed Wind Direction Wind Speed |
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First ISCCP Regional Experiment (FIRE)
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UND CITATION
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| FIRE_CI2_CITATN_1HZ | Air Flow Angle Condensation Nuclei Dew/Front Point Temperature Liquid Water Content Nitrogen Dioxide Ozone Pressure Supercooled Liq. Water Content Temperature Wind Direction Wind Speed |
| FIRE_CI2_CITATN_PMS | Clouds |
| FIRE_CI2_CITATN_5SEC | Barometric Altitude Cloud Ice Cloud Particles Condensation Nuclei Condensation Nuclei Flow Rate Condensation Nuclei Temp Dew/Frost Point Temperature Ice Water Content Liquid Water Content Mixing Ratio Nitrogen Dioxide Ozone Potential Temperature Relative Humidity Reverse Flow Temperature Static Pressure Temperature Vapor Pressure Vertical Velocity Vertical Wind Acceleration Vertical Wind Angle Vertical Wind Speed Virtual Temperature Wind Direction Wind Speed |
| FIRE_CI2_CITATN_IWC | Ambient Temperature Barometric Altitude Dew/Frost Point Temperature Diffusional Growth Rate Ice Water Content Particle Diameter Particle Number Concentration Precipitation Rate Radar Reflectivity Relative Humidity Static Pressure Vertical Velocity Water Vapor Density |
| FIRE_CI2_CITATN_24HZ | Static Pressure Temperature Vertical Wind Acceleration Vertical Wind Speed Wind Direction Wind Speed |
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| FIRE_CI2_CITATN_1HZ | ALCOHOL CONDENSING CHEMILUMINESCENT CHILLED MIRROR FLOW ANGLE SENSORS HOT-WIRE ICING RATE DETECTOR PRESSURE TRANSDUCER REVERSE FLOW TEMPERATURE PROBES |
| FIRE_CI2_CITATN_PMS | FSSP PMS 1D-C PROBE PMS 1D-P PROBE |
| FIRE_CI2_CITATN_5SEC | ALCOHOL CONDENSING CHEMILUMINESCENT CHILLED MIRROR FLOW ANGLE SENSORS FSSP ICING RATE DETECTOR JW PROBE PLATINUM RESISTANCE PMS 1D-C PROBE PMS 1D-P PROBE PMS 2D-C PROBE PRESSURE TRANSDUCER REVERSE FLOW THERMOMETER VARIABLE CAPACITANCE |
| FIRE_CI2_CITATN_IWC | PMS 2D-C PROBE PMS 2D-P PROBE |
| FIRE_CI2_CITATN_24HZ | FLOW ANGLE SENSORS THERMOMETER VARIABLE CAPACITANCE |
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| Data Set Name |
Min Lat |
Max Lat |
Min Lon |
Max Lon |
|---|---|---|---|---|
| FIRE_CI2_CITATN_1HZ | 33.37 | 38.82 | -96.41 | -92.76 |
| FIRE_CI2_CITATN_PMS | 33.37 | 38.82 | -96.41 | -92.76 |
| FIRE_CI2_CITATN_5SEC | 37.05 | 38.82 | -96.41 | -93.71 |
| FIRE_CI2_CITATN_IWC | 33.37 | 38.82 | -96.41 | -92.76 |
| FIRE_CI2_CITATN_24HZ | 33.37 | 38.82 | -96.41 | -92.76 |
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Not applicable.
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| Data Set Name |
Begin Date |
End Date |
|---|---|---|
| FIRE_CI2_CITATN_1HZ | 11-14-1991 | 12-07-1991 |
| FIRE_CI2_CITATN_PMS | 11-14-1991 | 12-07-1991 |
| FIRE_CI2_CITATN_5SEC | 11-22-1991 | 11-22-1991 |
| FIRE_CI2_CITATN_IWC | 11-14-1991 | 12-07-1991 |
| FIRE_CI2_CITATN_24HZ | 11-14-1991 | 12-07-1991 |
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A general description of data granularity as it applies to the IMS appears in the EOSDIS Glossary.
Native Format.
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The Langley DAAC performs an inspection process on this data received by the data producer via ftp. The DAAC checks to see if the transfer of the data completed and were delivered in their entirety. An inspection software was developed by the DAAC to see if the code was able to read every granule. The code also checks to see if every parameter of data falls within the ranges which are included in the granule. This same code extracts the metadata required for ingesting the data into the IMS. If any discrepancies are found, the data producer is contacted. The discrepancies are corrected before the data are archived at the DAAC.
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There are no plans for future modifications of these data sets.
There are sample read software available for these data sets.
The software can be obtained through the Langley DAAC. Please refer to the contact information below. The software can also be obtained at the same time the user is ordering these data sets.
The Langley DAAC Information Management System (IMS) is an on-line system that features a graphical user interface (GUI) which allows users to query the Langley DAAC data set holdings, to view pre-generated browse products, and to order specific data products. Users may also request data by letter, telephone, electronic mail (INTERNET), or personal visit.
The Langley DAAC User and Data Services (UDS) staff provides technical and operational support for users ordering data. The Langley DAAC Handbook is available in a postscript file through the IMS for users who want detailed information about the Langley DAAC holdings. Users may also obtain a copy by contacting:
Langley DAAC User and Data Services OfficeThe Langley DAAC will continue to archive this data. There are no plans to reprocess.
There are no output products available at this time.
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