ARW

120 Day ASOS Reassessment

Table of Contents

INTRODUCTION

1.1 BACKGROUND ON AUTOMATED SURFACE OBSERVING SYSTEM

1.1.1 Description of ASOS

1.1.2 Current Deployment and Commissioning

1.1.3 Service Standard Levels

1.2 120-DAY RE-ASSESSMENT PLAN

1.2.1 Background

1.2.2 Scope

1.2.3 Time Frame

1.2.4 Team Members

1.2.5 Re-Assessment Plan

1.3 ORGANIZATION OF REPORT

SITE VISITS

2.1 PURPOSE

2.2 IDENTIFICATION OF SITES

2.3 TRIP REPORTS

2.3.1 Eastern West Virginia Regional/Shepherd Field, Martinsburg, WV

2.3.2 Elkins-Randolph County, Jenning Randolph Field, Elkins, WV

2.3.3 Raleigh County Memorial Airport, Beckley WV

2.3.4 Mercer County Airport, Bluefield, WV

2.3.5 Frank Wiley Field, Miles City, MT

2.3.6 Bert Mooney Field, Butte, MT

2.3.7 Mission Field, Livingston, MT

2.3.8 Bacon County Airport, Alma, GA

2.3.9 Wausau Municipal Airport, Wausau, WI

2.3.10 Paso Robles Municipal Airport, Paso Robles, CA

2.3.11 Ketchikan International Airport, Ketchikan, AK

2.3.12 Kodiak Airport, Kodiak, AK

2.3.13 Houlton International, Houlton, ME

2.3.14 Edward F. Knapp State Airport, Montpelier VT

2.3.15 Roswell Industrial Air Center, Roswell, NM

EVALUATION METHODOLOGIES

3.1 PURPOSE

3.1.1 Areas of Analysis

3.1.2 Objective Assessment

3.1.3 Process

3.2 VALIDITY—ANALYSIS OF OBSERVATIONS FOR AUGMENTATION/BACKUP

3.2.1 Purpose

3.2.2 Identification of Sites

3.2.3 Evaluation Methodology

3.2.3.1 Process

3.2.3.2 Assumptions

3.2.3.3 Operationally Significant Changes

3.2.3.4 Data Source

3.2.4 Variables

3.2.5 Results

3.3 AVAILABILITY—COMPARISON OF ASOS TO LONGLINE DISSEMINATION

3.3.1 Purpose

3.3.2 Identification of Sites

3.3.3 Evaluation Methodology

3.3.3.1 Process

3.3.3.2 Data Source

3.3.4 Results

3.4 VALIDITY—BLIND COMPARISON OF AUTOMATED AND MANUAL OBSERVATIONS

3.4.1 Purpose

3.4.2 Identification of Sites

3.4.3 Evaluation Methodology

3.4.3.1 Process

3.4.3.2 Assumptions and Limitations

3.4.3.3 Parameters and Comparison Method

3.4.3.4 Data Source

3.4.3.5 Software Tools

3.4.4 Results

3.4.4.1 Overall Comparability

3.4.4.2 Comparability of Visibility Observations

3.4.4.3 Comparability of Ceiling Observations

3.4.4.4 Differences in Wind Direction and Speed

3.4.4.5 Comparability of Present Weather

3.4.4.6 Differences in Temperature and Dew Point

3.4.4.7 Differences in Altimeter

3.5 PRE-COMMISSIONING PROCESS DATA ANALYSIS

3.5.1 Background

3.5.2 Purpose

3.5.3 Identification of Sites

3.5.4 Evaluation Methodology

3.5.4.1 Process

3.5.4.2 Assumptions

3.5.4.3 Data Source

3.5.5 Results

3.5.5.1 Site Survey Summaries

3.5.5.2 Site Survey Results/Findings

3.5.5.3 Pre-Commissioning Process

3.5.5.4 Pre-Commissioning Results/Findings

3.6 RELIABILITY—ASOS SENSORS MEAN TIME BETWEEN FAILURE

3.6.1 Purpose

3.6.2 Identification of Sites

3.6.3 Evaluation Methodology

3.6.3.1 Process

3.6.3.2 Assumptions

3.6.3.3 Data Source

3.6.3.4 Software Tools

3.6.4 Extraneous Variables

3.6.5 Results

3.7 RESPONSIVENESS TO CHANGING CONDITIONS

3.7.1 Purpose

3.7.2 Identification of Sites

3.7.3 Evaluation Methodology

3.7.3.1 Process

3.7.3.2 Assumptions

3.7.3.3 Parameters

3.7.3.4 Data Source

3.7.3.5 Software Tools

3.7.3.6 Evaluation Method

3.7.4 Results

3.7.4.1 Ceiling

3.7.4.2 Visibility

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