Basically, an EIRP value of zero means you can't get it. Also, if you look at the beam, sometimes you may be able to see a satellite, but it isn't beaming anything in your direction. But in the case of the two satellites you list, you can't even see them (below the horizon).
AZBox Ultra HD + Pansat 3500SD + EMP Centauri 8x1 + 4x1 DiSEqC + 22KHz switches
Ariza 80cm: G19 (97), AMC1 (103), Echo11 (110) / Fortec 80cm: AMC16 (85), G28 (89) / Fortec 80cm: AnikF3-Echo14 (119), AMC21 (125) / Ariza 80cm: Echo9 (121) / Star Choice 75e: Echo12 (61.5), AMC6 (72), AMC9 (83), SES2 (87), G25 (93) / SC 60e: HISPST (30) / SC 60e: G11 (91), G3C (95), SES1 (101) / SC 60e: (107.3), (111.1) SC subscription dish (+FTA)
Avatar: 2008 setup 61.5, 72 or 74 (selectable), 79, 87