| Web Apps/Service |
Description |
Date |
| Google Earth - Access Prediction Service |
This KML network link uses Analytical Graphics, Inc’s (AGI) Dynamic Geometry Library (DGL) to predict 90 minutes of access opportunities for several satellites given the user’s current position within GE. The results of the access opportunities are listed in order of initial access chronologically in a web browser embedded in GE. The listing includes start time, stop time, and duration. |
09/30/2008 |
| Google Earth Satellite Database |
This KML network link visualizes all earth orbiting objects tracked by the United States Strategic Command (USSTRATCOM) using the satellite database processed by Analytical Graphics, Inc. using the Dynamic Geometry Library in AGI Components. All satellites are tracked in real-time and updated every 30 seconds. Please open this link using Google Earth or other fully capable KML viewer. For those interested, the source code to this WebApp is available here. |
10/24/2008 |
| GPS Date Calendar |
The GPS Date Calendar displays a standard calendar with dates specific to the GPS community. Dates included are: GPS Week (current and full), day of week, day of year and time of week. |
08/27/2008 |
| GPS Navigation Accuracy |
This web application calculates GPS Navigation Accuracy for the specified time interval and location of the GPS receiver. Specifically, it calculates Total System Error and Signal In Space Error and generate the appropriate reports and graphs. This application has been built using the Navigation Accuracy Library, which is part of AGI Components. |
09/03/2008 |
| GPS Navigation Accuracy Web Service |
This web service allows you to retrieve GPS positioning errors using a standard receiver model. You may specify the number of receiver channels as well as the receiver mask angle. Either a graph of the errors or a report may be generated. This application has been built using the Navigation Accuracy Library, which is part of AGI Components. |
09/26/2008 |
| GPS RAIM Web Service |
The GPS Receiver Autonomous Integrity Monitoring (RAIM) web service allows a user to determine RAIM availability, provided a date, an ICAO (International Civilian Aviation Organization ) code for an airport, and some basic GPS receiver information. RAIM availability is determined by calculating Fault Detection RAIM outages for En-Route, Non-Precision Approach and Terminal cases. The sample application shows one possible use of this service. |
09/11/2008 |
| GPS Satellite Outage Calendar |
This Calendar displays historical, current and predicted GPS satellite outages based on the latest satellite outage file (SOF) produced by the United Stated Air Force. Clicking on a specific calendar date provides more information about the outage. You can also view all historical outages in a table format. |
09/05/2008 |
| GPS Satellite Outage Web Service |
This web service allows you to connect and retrieve outage information for specific GPS PRNs, or specific time intervals, or both. Using just the PRN, a list of strings will be returned of all times that PRN has been unhealthy, based on the latest satellite outage file (SOF). Providing a start and stop time will return a list of strings denoting all PRNs that were unhealthy during that interval, with their outage times. Another service allows you to specify both the PRN and the time interval to further thin the results. The dates returned can be either Gregorian (standard date format) or Julian date format.
This example application shows how this service could be used. |
09/05/2008 |
| GPS Satellite Performance |
GPS satellite performance is at the heart of navigation accuracy. AGI Performance Assessment Files (PAFs) and Prediction Support Files (PSFs), contain GPS satellite errors which AGI uses to calculate receiver positioning errors. This utility helps to visualize and understand those GPS satellite errors. |
08/27/2008 |
| Lunar Phase |
This website calls a web service to compute the lunar phase at any time. The service determines the position of the Sun, Earth, and Moon from DE405 data. It computes the Earth-Moon-Sun angle from this information and derives the lunar phase from that. |
09/23/2008 |
| Satellite Tracker |
This web application generates ground tracks on an embedded Google map, as well as ephemeris tables, for a user-selected satellite viewed from a user-defined location during a user-specified time period. |
08/27/2008 |
| Space Data Reporting |
The Space Data Reporter is an example implementation of AGI’s new Dynamic Geometry Library (DGL). This suite of Web Services powered by the DGL enables users to:
- Publish ground tracks
- Derive current locations of satellites
- Calculate inter-visibility between satellites and locations on the ground
- Compute GPS dilution of precision (DOP)
- Analyze STK generated conjunction analysis (CAT) |
03/26/2008 |
