Orbits and Propagators - AGI

Diseño de Vehículos Espaciales 1DVE1‐T07‐24TLEs – Line 1 ctd1 AAAAAU YYLLLPPP BBBBB.BBBBBBBB .CCCCCCCC DDDDD-D EEEEE-E F GGGGZ• [DDDDD‐D] ‐ Drag Parameter (rev/day 3 )• 1/6 x d 2 N/dt 2•"‐D" is the tens exponent (10‐D).• [EEEEE‐E] E] – B* Drag Parameter (1/Earth Radii)B * = C D ρ 0 A / 2m• Pseudo Ballistic Coefficient• The "‐E" is the tens exponent (10‐E)• [F] ‐ Ephemeris Type• 1‐digit integer (0 = SGP or SGP4)• [GGGG] ‐ Element Set Numberassigned sequentially• [Z] ‐ Checksum (1‐digit integer)• Computed from sum of all integercharacters plus 1 for each “‐”• Modulo‐10 of the result is ‘Z’ oneach line