A New GPT2w Model Improved by PSO-LSSVM for GNSS High-Precision Positioning

Figure 10

Frequency histogram of the ZTD difference using the GPT2w model at selected stations. (a) HKKT. (c) HKOH. (e) HKPC. (g) HKSC. (i) HKSS. (k) HKST. Frequency histogram of the ZTD difference using the PSO-LSSVM model at selected stations. (b) HKKT. (d) HKOH. (f) HKPC. (h) HKSC. (j) HKSS. (l) HKST.

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