A format for expressing the

Keplerian Elements of a

satellite. It takes the form:

`AAAAAAAAAAA `

1 NNNNNU NNNNNAAA NNNNN.NNNNNNNN +.NNNNNNNN +NNNNN-N +NNNNN-N N NNNNN

2 NNNNN NNN.NNNN NNN.NNNN NNNNNNN NNN.NNNN NNN.NNNN NN.NNNNNNNNNNNNNN

Where:

`Line 1`

`
Satellite name`

`
Line 2`

`
Column Description`

01-01 Line Number of Element Data

03-07 Satellite Number

10-11 International Designator (Last two digits of launch year)

12-14 International Designator (Launch number of the year)

15-17 International Designator (Piece of launch)

19-20 Epoch Year (Last two digits of year)

21-32 Epoch (Day number and fractional portion of the day)

34-43 First Time Derivative of the Mean Motion divided by 2.

or Ballistic Coefficient (Depending of ephemeris type)

45-52 Second Time Derivative of Mean Motion divided by 6. (Blank if N/A)

54-61 BSTAR drag term if GP4 general perturbation theory was used.
Otherwise, radiation pressure coefficient.

63-63 Ephemeris type

65-68 Element number

69-69 Check Sum (Modulo 10)

`
Line 3`

`
Column Description`

01-01 Line Number of Element Data

03-07 Satellite Number

09-16 Inclination Degrees

18-25 Right Ascension of the Ascending Node Degrees

27-33 Eccentricity (decimal point assumed)

35-42 Argument of Perigee Degrees

44-51 Mean Anomaly Degrees

53-63 Mean Motion Revs per day

64-68 Revolution number at epoch Revs

69-69 Check Sum (Modulo 10)