Mars Express Path Loss Calculator

by Charlie Suckling G3WDG

F/GHz

D/AU

Distance

Path Loss

8.4

1.06

1.59E+08

km

274.9

dB

Rx Dish Dia/m

Efficiency/%

Gain

3

70

46.9

dB

TX Dish Dia/m

Efficiency/%

Gain

2.2

53

43.0

dB

RX NF/dB

Tant/K

Tsys/K

RX BW/Hz

RX Noise power

0.8

25

83.7

1

-209.4

dBW

TX Power/dBW

TX EIRP

14.4

57.4

dBW

Modulation loss/dB

Spacecraft Speed/km/s

10

14.9

S/N in 1Hz BW

Doppler

28.7

dB

415.8

kHz

Notes: Data on MEX dish size and power are not necessarily accurate, but resulting EIRP is believed to be correct.

User inputs are in gree shaded boxes

Distance to spacecraft is in AU (astronomical units), per the data given in the JPL Ephemeris site

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