Table of Contents

1.0 Introduction

2.0 Scope

3.0 Intended Audience

4.0 General Data Management

4.1 Overview
4.2 Data Processing and Storage
4.2.1 Logging
4.2.2 Data Routing/Flow
4.2.3 Text Product Dissemination
4.2.4 Non-Text Dissemination
4.3 Data Controller Processes
4.3.1 Overview
4.3.2 Interaction with Decoders
4.3.3 Decoding and Storage
4.4 Quality Control
4.5 Notification
4.6 Purging
4.6.1 Internal, AS, DS
4.6.2 External, LS

5.1 LDAD Server (LS)
5.1.1 LS FileSystems
5.1.2 LS Directory Structure
5.2 Data Server (DS)
5.2.1 Data Directories
5.2.2 Run-Time Directories
5.3 Application Server (AS)
5.3.1 Data Directories
5.3.2 Run-Time Directories

6.1 Hardware Architecture
6.1.1 LAN Hub
6.1.2 Terminal Server
6.1.3 Modem Nest
6.1.4 Dedicated Modems
6.1.5 Dial-In / Dial-Out Modems
6.1.6 DTMF<->ASCII Converter
6.1.7 Firewall
6.1.8 LDAD Server
6.2 LDAD LAN Hub Configuration
6.3 LDAD Terminal Server Configuration
6.4 LDAD Terminal Server Configuration Command Sequence
6.4.1 CSPORTD
6.5 LDAD Dial Out Modem #1 Configuration
6.6 LDAD Dial Out Modem #2 Configuration
6.7 LDAD Dial In Modem Configuration
6.8 LDAD Dedicated Modem Configuration
6.9 LDAD Firewall Configuration
6.9.1 LDAD Firewall O.S. Configuration
6.9.2 LDAD TIS Firewall Configuration
6.10 LDAD Radius Server Configuration
6.11 LDAD Fax Server Configuration
6.11.1 Faxmodem
6.11.2 HylaFAX Software Preparation
6.11.3 Prepare NWS cover page
6.11.4 Send a Fax
6.11.5 Setting up Periodic Maintenance Work
6.12 LDAD FTP Server Configuration
6.12.1 Prepare the Source Code
6.12.2 Edit the Source Code
6.12.3 Build and Install the Code

7.1 User Interface
7.2 Scheduler
7.3 Communication Server (CO)
7.4 IGC
7.5 Pre-Processors
7.6 Decoder & Storage
7.7 BBS
7.8 Trigger
7.9 Quality Control (QC)

8.1 Process and System
8.1.1 Administration
8.1.2 Restart
8.1.3 Help
8.2 Data Acquisition
8.3 Dissemination
8.4 QC Status
8.5 LDAD Scheduler
8.6 Error Mail to LDAD Site Administrator

9.1 Environment Variables
9.2 Trigger
9.3 BBS
9.3.1 BBS Executables and Scripts
9.3.2 Login Timout
9.3.3 Configuring the BBS Menus
9.3.4 Error Logging Files
9.3.5 E-mail from External Users
9.4 Pre-Processors
9.5 Decoding and Storage
9.5.1 LDADinfo.txt
9.5.2 LDADProvider.txt
9.5.3 Station Files
9.5.4 Description files
9.5.5 LdadWmoAwipsId.tbl
9.6 QCMS Intervention
9.7 Data Dissemination
9.8 LDAD Monitor
9.8.1 Administration Configuration Files
9.8.2 Monitor Configuration Files

10.1 Data Ingest
10.2 Decoding and Storage
10.3 Monitoring
10.4 Dissemination
10.5 MSAS

11.1 Processors Overview
11.2 Data Servers/Application Server
11.2.1 dsswap entries
11.2.2 asswap entries

12.1 MSAS and LDAD Quality Control
12.1.1 Corrupt MSAS grids
12.1.2 MSAS bullseyes associated with bad observations not flagged as bad
12.1.3 Lack of detail associated with good observations flagged as bad

Appendix A - How to Add a New Data Source

Appendix B - Non-LDAD Software

Appendix C - LdadUtils.pl

List of Tables

Figure 4.1 LDAD Data Flow Diagram
Figure 4.2 LARC Data Acquisition
Figure 4.3 WWA Dissemination Flow
Figure 4.4 LARC Data Decoder
Figure 4.5 CSV Mesonet Data Controller
Figure 4.6 MSAS Data Flow
Figure 6.1 Plaintree 1018
Figure 6.2 Motorola Modulus 21 & Assoc. Backplane
Figure 6.3 H-P Netserver E40
Figure 6.4 H-P D270 Server
Figure 6.5 1018 System Manager Screen Shot
Figure 6.6 1018 System Configure Screen Shot
Figure 8.1 LDAD Monitor Summary Page
Figure 8.2 LDAD Process and System Monitor
Figure 8.3 LDAD Web Authentication Interface
Figure 8.4 LDAD Administration Page
Figure 8.5 LDAD Restart Page
Figure 8.6 LDAD Data Acquisition Monitor
Figure 8.7 Hourly QC Message for ASOS (page 1 of 4)
Figure 9.1 Subset of the BBS Config File (tmenu.mb)
Figure 9.2 LdadInfo.txt
Figure 9.3 LDADProvider.txt
Figure 9.4 Station.txt example
Figure 9.5 Example .desc file
Figure 9.6 Sample data report
Figure 9.7 Text storage control file
Figure 9.8 A Reject List