APPENDIX A1$_{ }$ sources, particularly aviation sources, such as aircraft as well as  auxiliary power units (APUs),  and ground support equipment (GSE) (see  Appendices A2  ( Auxiliary Power Units Emissions  Inventory for Criteria Pollutants ) and  A3  ( Ground Support Equipment Emissions Inventory for  Criteria Pollutants ) for more information on computing emissions from APUs and GSE).  As discussed, aircraft emissions inventories prepared using EDMS/AEDT are mainly a function  of the number of aircraft operations, fleet mix, TIM and aircraft engine operating features (i.e.,  fuel flow rates and emission factors).  In this application, aircraft operational data are subdivided among four operational categories: 1) air carrier (including cargo),  2) air taxi/commuter, 3) GA, and 4) military. The  types and number of aircraft within each of t hese aircraft categories can vary widely and are  rather airport-specific. These operational data for most airports under current and historical  conditions can be obtained from the referenced sources listed in  Table A1-2  ( Aircraft  Operational Input Data Sources ) or may be obtained from the airlines.  AEDT Version 2b will replace the legacy airport air quality and noise analysis tools - the Emissions and  Dispersion Modeling System (EDMS) and the Integrated Noise Model (INM), see  Section 5  ( Air Quality  Assessment Models ) of the  Handbook . The website for AEDT is http://aedt.faa.gov/.  9  5$_{ }$ Data Source  Description  Terminal Area Forecast  (TAF)  Forecasts aviation activity at active airports in the Airport Systems (NPIAS). This information can be accessed at the website: http://aspm.faa.gov/main/taf.asp.  The Operations Network  (OPSNET)  Provides airport activity level (per air carrier, air taxi, general military). This data source contains proprietary information and requires an FAA  registered user name and password. After acquiring a login from information  can  be  accessed  at  the  following https://aspm.faa.gov/opsnet/sys/Default.asp.  Air Carrier Statistics  Database  (T-100 database)  Earliest data year is 1990. Periods of data available for a month , a quarter, and a  year. Form 41/T-100 records are available for all of the airports in FAA’s NPIAS  and 313 additional air transportation facilities. The T -100 database does n capture every aircraft operations at the airport; only those that have been reported.  The  T -100  database  can  be  accessed  at  the  follo http://www.transtats.bts.gov/tables.asp?db_id=111&DB_Name=.  Airport IQ5010 TM  Airport Master Records and  Reports  The  Based Aircraft & Operations  section data; this information can also be used to develop a  general fleet mix. This  information  can  be  accessed  at  the  http://www.gcr1.com/5010web/.  Airport Noise & Operations  Monitoring System  (ANOMS)  Reports aircraft operations, including aircraft type (such as passenger, general aviation and other); however, airports are not required to have an ANOMS  so systems are in limited use.  JP Airline Fleets  Provides airport activity level. The information is proprietary and purchased at the following website: http://www.buchair.com/JPAF.htm.  Table A1-2. Aircraft Operational Input Data Sources  A1.3.1  Aircraft Operations 