SECCHI height vs. time map for 28 and 29 March. The map is generated by taking a strip of images at a given position angle, in this case, 274° from solar north, and stacking each time step together. The position angle differs from the SoloHI position angle in Fig. 6 because the observers on the different spacecraft observe from opposite directions. The y-axis is the radial distance in R_⊙.