<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 07:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 33 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Severe F-spread, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.02.16 (047) 07:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202604702160740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.175" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.827" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="375.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="309.288" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="262.514" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.335" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="66.322" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.172" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.150" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="54.620" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.190" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="45">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 280.000 280.000 282.000 284.000 286.000 288.000 290.000 285.000 280.000 275.000 275.000 275.000 275.000 275.000 277.500 280.000 280.000 280.000 280.000 285.000 285.000 287.500 290.000 290.000 290.000 293.333 296.667 300.000 300.000 305.625 311.250 316.875 322.500 328.125 333.750 339.375 345.000 355.000 365.000 377.500 390.000 395.000 375.000 495.060
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 72 69 66 0 66 69 69 66 75 66 75 0 72 69 69 63 69 0 69 72 66 66 75 78 69 66 66 75 72 69 0 0 66 60 63 60 0 0 57 57 57 51 54 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="136">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.584 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.167 180.0 185.0 190.0 195.0 200.0 205.0 207.751 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 309.288 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.274 0.23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.223 0.246 0.27 0.294 0.317 0.341 0.354 0.39 0.506 0.666 0.853 1.065 1.308 1.598 1.957 2.412 2.958 3.504 3.962 4.318 4.594 4.808 4.974 5.1 5.192 5.255 5.291 5.3 5.3 5.288 5.257 5.211 5.151 5.078 4.994 4.9 4.799 4.691 4.578 4.461 4.34 4.217 4.093 3.968 3.843 3.718 3.594 3.472 3.352 3.233 3.117 3.004 2.893 2.785 2.679 2.577 2.478 2.382 2.289 2.199 2.111 2.027 1.946 1.868 1.792 1.72 1.65 1.582 1.518 1.455 1.395 1.338 1.282 1.229 1.178 1.129 1.082 1.037 0.994 0.952 0.913 0.874 0.838 0.803 0.769 0.737 0.706 0.676 0.648 0.62 0.594 0.569 0.545 0.522 0.5 0.479 0.459 0.44 0.421 0.403 0.386 0.37 0.354 0.339 0.325 0.311 0.298 0.285 0.273 0.262 0.251 0.24 0.23 0.22 0.211 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="5.3" PeakHeight="309.288" Num="5" zHalfNm="262.514" Error="2.946">
-116.526 25.494 -15.388 7.169 -2.286
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.751" Depth="0.154"/>
<TopsideChapman PeakHeight="309.288" PeakDensity="348511.16" PeakScaleHeight="36.15" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
