EA6VQ's 144 MHz EME calendar for year 2017

You could also be interested in the on-line EME calculator and the DX news and calendar database

   EA6VQ's EME WEEKEND CALENDAR - 2017    EA6VQ's EME BEST DAYS - 2017 (DGRD < 2.0 dB)
  

Weekend
2017

CONDITIONS on 144 MHz

Jan    07-08

Moderate

14-15

Excellent -> Very good

21-22

Poor -> Very Poor

28-29

Moderate and New Moon on 28th

Feb     04-05

Moderate

11-12

Very good -> Good

18-19

Poor -> Very Poor

25-26

Moderate and New Moon on 26th

Mar    04-05

Moderate -> Poor

11-12

Good

18-19

Very poor

25-26

Moderate -> Good

Apr     01-02

Moderate -> Poor

08-09

Good -> Moderate

15-16

Very poor

22-23

Good

29-30

Moderate -> Poor
May    06-07 Moderate

13-14

Very poor

20-21

Good

27-28

Moderate

Jun    03-04

Moderate

10-11

Very poor

17-18

Good

24-25

Moderate and New Moon on 24th
Jul    01-02 Moderate -> Poor
08-09 Very poor
15-16 Moderate
22-23 Moderate and New Moon on 23th
29-30 Moderate -> Poor

Aug    05-06

Very Poor -> Poor

12-13

Moderate

19-20

Good -> Excellent

26-27

Poor
Sep    02-03 Poor -> Moderate
09-10 Moderate
16-17 Very good -> Excellent
23-24 Poor
30-01 Poor -> Moderate

Oct    07-08

Moderate

14-15

Excellent -> Very good

21-22

Poor -> Very Poor

28-29

Poor -> Moderate
Nov    04-05 Moderate
11-12 Very good
18-19 Very Poor and New Moon on 18th
25-26 Poor -> Moderate

Dec   02-03

Moderate

09-10

Very good -> Good

16-17

Very Poor

23-24

Moderate

30-31

Moderate
        

Days

CONDITIONS on 144 MHz
Jan 12-16 Best DGRD = 0.8 dB on 13th
Feb 9-12 Best DGRD = 0.9 dB on 10th
Feb 27 Best DGRD = 1.9 dB on 27th
Mar 8-11 Best DGRD = 1.1 dB on 9th
Mar 26-27 Best DGRD = 1.7 dB on 27th BUT New Moon
Apr 4-7 Best DGRD = 1.1 dB on 5th
Apr 23-24 Best DGRD = 1.8 dB on 23rd
May 1-5 Best DGRD = 1.1 dB on 2nd-3rd
May 29-Jun 1 Best DGRD = 0,8 dB on 30th
Jun 25-29 Best DGRD = 0.5 dB on 26th (Best conditions of 2017)
Jul 23-26 Best DGRD = 0.5 dB on 24th (Best conditions of 2017)
BUT New Moon on 23rd
Aug 19-22 Best DGRD = 0.6 dB on 20th BUT New Moon on 21st-22nd
Sep 16-19 Best DGRD = 0.8 dB on 17th BUT New Moon on 19th
Oct 13-16 Best DGRD = 0.9 dB on 14th
Nov 9-13 Best DGRD = 0.8 dB on 10th
Dec 6-10 Best DGRD = 0.6 dB on 7th

The best EME conditions occur when:

  1. The earth-moon distance is at the absolute minimum and
  2. The moon is in the coldest sky region along the moon path.

The effect of distance is independent of frequency, but sky temperature decreases with frequency, up to ~1 GHz and then levels out. The EME signal-to-noise ratio, in dB, is DGRDaded, from the minimum, by a factor (DGRD, see below), which varies over hourly, daily, weekly, monthly and yearly time periods. As a guide for the basic weekend EME conditions the present calendar lists the expected conditions based on the DGRDadation (DGRD) value. Factors such as local noise, antenna beam width, side lobes, polarization, etc. can also affect the s/n ratio of moon bounce signals.

Conditions:

Summary of EME conditions as controlled by DGRD at 144 MHz and New Moon. Conditions may be worse, due to ionospheric disturbance, local noise and polarity, but not better than indicated.

In general, 144 MHz DGRD:

Within a day of New Moon (NM), high sun noise can make conditions very bad regardless of the DGRD.
 

 
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