Glass box
This page watches itself being delivered. Everything below is live: the edge that served you a moment ago, who else is on the site, and what it all costs, read from CloudFront, DynamoDB and Cost Explorer while you look at it.
Your request
Read from this page's own Server-Timing header and your browser's Navigation Timing.
Timing appears once the page has finished loading.
Who's here
Everyone on any page in the last five minutes. City-level, rounded to about 11 km, and no IP address is ever stored.
On the globe
- A visitor, in the last five minutes
- The CloudFront edge that served them
- Their request, visitor to edge
- Crewed station (ISS, Tiangong)
- Satellite, at its real altitude
- Where it goes in the next orbit
- Day and night, as they are right now
- City lights on the night side
Satellites overhead right now ~50
| Satellite | Altitude | Over |
|---|---|---|
| Fetching orbits… | ||
Orbits from CelesTrak (stations, science, Earth observation, weather, Starlink, OneWeb), refreshed every six hours; each position is worked out in your browser every second (SGP4). Models are drawn far larger than life; altitudes are true. Orbit paths are drawn for the crewed stations and the best-known science and Earth-observation satellites.
The bill
Month to date for the whole AWS account this site lives in, from Cost Explorer.
How it's wired
One CloudFront distribution in front of everything. The dots move when this page talks to it.
Read the CloudFormation template — the table, both functions, their function URLs (IAM-only; CloudFront signs every request through an origin access control), the header policy that hands the functions your city, the Server-Timing policy that made the numbers at the top of this page possible, and a budget alarm.