设计Rinex O文件和Rinex N文件读取类，实现对Rinex文件内容的读取和显示。

以下是一个简单的示例代码，用于读取Rinex O文件和Rinex N文件：

import numpy as np

class RinexOFile:
    def __init__(self, filename):
        self.filename = filename
        self.header = {}
        self.observations = {}

        with open(filename, 'r') as f:
            lines = f.readlines()
            for i, line in enumerate(lines):
                if i < 22:
                    self.parse_header_line(line)
                else:
                    self.parse_observation_line(line)

    def parse_header_line(self, line):
        label = line[:60].strip()
        value = line[60:].strip()
        self.header[label] = value

    def parse_observation_line(self, line):
        year = int(line[1:3])
        month = int(line[4:6])
        day = int(line[7:9])
        hour = int(line[10:12])
        minute = int(line[13:15])
        second = float(line[15:26])
        num_sats = int(line[29:32])
        sats = []
        obs = []
        for i in range(num_sats):
            start = 32 + i * 16
            end = start + 3
            sats.append(line[start:end])
            for j in range(4):
                start = end + j * 16
                end = start + 14
                obs.append(float(line[start:end]))
        time = '{:04d}-{:02d}-{:02d}T{:02d}:{:02d}:{:02d}'.format(year + 2000, month, day, hour, minute, int(second))
        self.observations[time] = np.array(obs).reshape(num_sats, 4)

class RinexNFile:
    def __init__(self, filename):
        self.filename = filename
        self.header = {}
        self.observations = {}

        with open(filename, 'r') as f:
            lines = f.readlines()
            for i, line in enumerate(lines):
                if i < 24:
                    self.parse_header_line(line)
                else:
                    self.parse_observation_line(line)

    def parse_header_line(self, line):
        label = line[:60].strip()
        value = line[60:].strip()
        self.header[label] = value

    def parse_observation_line(self, line):
        year = int(line[1:3])
        month = int(line[4:6])
        day = int(line[7:9])
        hour = int(line[10:12])
        minute = int(line[13:15])
        second = float(line[15:26])
        num_sats = int(line[29:32])
        sats = []
        obs = []
        for i in range(num_sats):
            start = 32 + i * 16
            end = start + 3
            sats.append(line[start:end])
            for j in range(5):
                start = end + j * 16
                end = start + 14
                obs.append(float(line[start:end]))
        time = '{:04d}-{:02d}-{:02d}T{:02d}:{:02d}:{:02d}'.format(year + 2000, month, day, hour, minute, int(second))
        self.observations[time] = np.array(obs).reshape(num_sats, 5)

用法示例：

rinexo = RinexOFile('example.obs')
print(rinexo.header)
print(rinexo.observations)

rinexn = RinexNFile('example.nav')
print(rinexn.header)
print(rinexn.observations)

请注意，这只是一个简单的示例代码，仅适用于一些简单的Rinex O和N文件。对于复杂的文件，还需要进行更多的解析和处理。