Aerospace

Challenge description

Analyzing what we know

The challenge provided a data.txt file containing TLE (Two-Line Element) data, commonly used to track satellites. Here’s the TLE provided:

1 43728U 18096K 23081.21782463 .01925735 32332–2 20784–2 0 9995
2 43728 97.3099 175.2941 0008625 277.9511 82.0794 16.10744455241223

Through research, I discovered that 43728 is the satellite ID.

Looking for the satellite through public records

I used the SatNOGS Network, a public database for satellite observations. Since the challenge required finding the last observation with a "Good" status, I filtered the results accordingly.

• SatNOGS Network

Steps I followed:

1. Navigate to the Observations tab.

2. Search for satellite ID 43728 in SatNOGS.

3. Filter for observations with a "Good" status.

4. Scroll to the last successful observation.

The last station with a “Good” status was 766 — Dunchurch.

Therefore, we found the flag

CyCTF{766-Dunchurch}