Definition
The six elements (temperature, humidity, pressure, wind, precipitation, sunlight) are the six core elements of meteorological observation: temperature, humidity, air pressure, wind speed, wind direction, precipitation, and sunlight. The six-element weather station can simultaneously collect the above data, providing basic observational support for weather forecasting, agricultural decision-making, traffic alerts, and renewable energy generation prediction. Observation data must meet meteorological industry standards, and the collection frequency is usually 1 minute to 1 hour.
The six elements are the foundation of surface meteorological observation and form a three-dimensional observation network together with radiosondes, radar, satellites, etc. Data quality directly affects forecast accuracy and the timeliness of disaster warnings.
Technical Features
Six-element weather stations use various sensors (platinum resistance temperature sensors, capacitive humidity sensors, barometers, anemometers, wind vanes, rain gauges, sunshine recorders, etc.). Data is aggregated by a collector and uploaded in a unified format to the meteorological cloud platform via IoT SIM cards or wired networks. Observation stations are often deployed outdoors, in mountains, islands, etc., and IoT SIM cards are suitable for scenarios without wired networks.
Use Cases
Six-element observations are widely used in weather stations, agricultural meteorology, traffic meteorology, renewable energy stations, airports, ports, and other scenarios. Data is uploaded in real time to the meteorological cloud platform via IoT SIM cards for short-term nowcasting, disaster warnings, precision irrigation decisions, and load forecasting. SimtoLink provides stable connectivity and dedicated APN for six-element weather stations, ensuring continuous and reliable transmission of observation data.
How the filing deadline constrains all six elements
A six-element station uses an IoT SIM to send one synchronized observation from a field site, a mountain, or an island that has no leased line. It does not mean six sensors each transmitting on their own. Temperature, humidity, pressure, wind, precipitation, and sunshine must be able to form one record at the same time, and wind includes both speed and direction. The logger should align these samples locally first, then send the package. If one channel is missing, the record still goes out, and it must say which element is missing. Do not fill the gap with the previous record's old value and pretend the set is complete. Filing has a deadline. A late record is backfill material. It must not pass as an on-time report. SIM attach only means the station can still transmit. It does not mean this minute's observation has already qualified.
The difference from a general automatic weather station is that here the six classes of elements arrive together, go missing together, and are explained together. A site that has only temperature through cannot be called a normal six-element filing. Rain is a cumulative total or a tipping-bucket pulse, sunshine is a period total, and wind often must keep both the instantaneous peak and the average. Those three time treatments must not be crushed into one average. If the package is too large it may be split, but the messages must share the observation time. After an outage, cache is resent in observation-time order and marked late.
Cumulative rain and instantaneous wind flattened into one period
A common mistake, made to save data, is to average wind and rain across an hour into one number. Tipping-bucket counts from a short heavy rain are spread thin, the peak gust disappears, and severe weather looks mild in the record. Rain should keep the cumulative increment or the time of each tip. Wind should keep at least the period average and the peak. Another mistake is a humidity sensor covered in dew, or a blocked rain gauge, that keeps reporting zero. The platform treats zero as truly no rain. A long run of constant zero or constant full scale should be marked suspect, not entered into the official series.
Clock drift makes sunshine accumulation cross midnight. Sunshine around the day boundary is booked to the previous day or the next, and daily statistics used by agriculture and energy are wrong. When a station cannot set its clock, mark the time unreliable. The data may still be kept for maintenance. It does not enter the official filing. For acceptance, disconnect the rain signal and keep the other elements: the message should show precipitation missing and the other five still present. Then stop the uplink for one period and restore it. That period is filed late at the original observation time, and it does not overwrite the new record of the next minute. Wind direction stuck at one angle with speed at zero for a long time should be recognizable as a stopped wind sensor, not as calm.
A late report must keep the original observation time
If the uplink drops for one period and then returns, that period is marked late at the original observation time. It must not overwrite the new record of the next minute, and the recovery time must not stand in as the observation time. When precipitation is missing, the other elements should still be filed, and the message must say precipitation is the missing one. Do not fill zero from the previous rain total. Wind keeps the period average and the peak. Rain keeps the increment or the bucket tips. Do not synthesize one average to save data. Sunshine that crosses midnight must fall on the correct day boundary.
Data whose time is unreliable may be kept for maintenance. It does not enter the official series. Wind direction pinned at one angle for a long time, with speed at zero, should be recognized as a stopped sensor, not as calm. A constant zero from a blocked rain gauge should be marked suspect. The six elements either share one package or travel in separate messages that share the observation time. A field station's filing qualifies only when late, missing, and stopped can be told apart.