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For the first few years of MWA observations, EOR observations were scheduled with the 'EOR1' grid point numbers, but then everyone started using 'sweet' gridpoint numbers for all observations. The only important thing is what actual delays are sent to the beamformers, not what the grid point number name is.

East-West Pointings

EoR observations typically only use the pointings directly east or west of zenith. The EoR group refers to these pointings with labels from -3 to +3.

This table shows the mapping between:

• SW - gridpoint number when gridpoint_name="sweet"
• E1 - gridpoint number when gridpoint_name="eor1"
• EW - "east-west" pointings
• az/el - azimuth and elevation (degrees)
• lsts range of local sidereal times for observations of the eor0 field at right ascension 0 (in degrees)

| EW | E1 | SW |  az |    el |        delays |    lsts  |
|----+----+----+-----+-------+-------------- | -------- |
| -3 |  5 | 26 |  90 | 69.16 | {0,3,6,9,...} | -28..-20 |
| -2 |  3 | 10 |  90 | 76.28 | {0,2,4,6,...} | -19..-12 |
| -1 |  1 |  2 |  90 | 83.19 | {0,1,2,3,...} | -12..-4  |
|  0 |  0 |  0 |   0 | 90.00 | {0,0,0,0,...} |  -4..+4  |
| +1 |  2 |  4 | 270 | 83.19 | {3,2,1,0,...} |  +4..+12 |
| +2 |  4 | 12 | 270 | 76.28 | {6,4,2,0,...} | +11..+19 |
| +3 |  6 | 28 | 270 | 69.16 | {9,6,3,0,...} | +19..+28 |