Measured flux as a function of heliographic location. Each panel shows a 2D histogram in the background as in Fig. 1. In the foreground, blue and red dots show the values computed at one day intervals with the Parker spiral method. Top row: trends versus radius, middle row: comparison against heliographic latitude, and bottom row: againstheliographic longitude. The middle and bottom rows have a common x-axis. The three columns depict data from PSP, STEREO A and Wind respectively. For the PSP heliospheric flux as a function of radius (top-left panel), solid black lines indicate fitted linear trends to the scatter points shown with negative and positive (blue and red) values fitted separately.