<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-12 -043 08:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2x cusp not found, 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" >
2026.02.12 (043) 08:40:00</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">
FF202604302120840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.252" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.383" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="306.250" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.612" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="301.288" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.762" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.661" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="112.780" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.816" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.188" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="92.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.880" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="28">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 236.500 238.000 239.500 241.000 242.500 244.000 245.500 247.000 248.500 250.000 255.000 260.000 265.000 270.000 275.000 280.000 280.000 288.750 297.500 306.250 318.377 333.823 354.165 382.172 423.180 488.978 611.785
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 69 0 0 0 0 0 0 0 0 0 0 0 0 0 63 57 63 0 60 60 60 63 54 0 0 0
</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 1.171875 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="181">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.057 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.362 140.0 145.0 150.0 155.0 160.0 162.723 165.0 170.0 175.0 180.0 185.0 189.085 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 301.288 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.406 0.53 0.593 0.612 0.603 0.577 0.53 0.456 0.336 0.287 0.287 0.287 0.287 0.287 0.287 0.287 0.315 0.377 0.438 0.5 0.562 0.612 0.628 0.734 0.868 1.036 1.261 1.618 2.233 2.611 2.82 2.964 3.072 3.159 3.229 3.287 3.336 3.376 3.41 3.438 3.46 3.477 3.489 3.497 3.5 3.5 3.499 3.493 3.484 3.471 3.454 3.434 3.411 3.385 3.356 3.325 3.292 3.256 3.219 3.18 3.139 3.097 3.054 3.01 2.965 2.919 2.873 2.826 2.778 2.731 2.683 2.635 2.587 2.539 2.491 2.443 2.396 2.348 2.302 2.255 2.209 2.164 2.118 2.074 2.03 1.986 1.944 1.901 1.86 1.819 1.779 1.739 1.7 1.662 1.624 1.587 1.551 1.515 1.48 1.446 1.413 1.38 1.347 1.316 1.285 1.255 1.225 1.196 1.168 1.14 1.113 1.086 1.06 1.035 1.01 0.986 0.962 0.939 0.916 0.894 0.872 0.851 0.83 0.81 0.79 0.771 0.752 0.734 0.716 0.699 0.681 0.665 0.649 0.633 0.617 0.602 0.587 0.573 0.559 0.545 0.532 0.518 0.506 0.493 0.481 0.469 0.458 0.446 0.435 0.425 0.414 0.404 0.394 0.384 0.375 0.365 0.356 0.348 0.339 0.331 0.322 0.314 0.307 0.299 0.292 0.284 0.277 0.271 0.264 0.257 0.251 0.245 0.239 0.233 0.227 0.221 0.216 0.211 0.205 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.612" PeakHeight="110.0" Num="3" Error="0.0">
-23.805 5.468 -0.606
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.612" EndFrequency="3.5" PeakHeight="301.288" Num="5" zHalfNm="222.762" Error="3.13">
-154.888 66.883 -31.999 9.484 -1.683
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="79.085" Depth="0.325"/>
<TopsideChapman PeakHeight="301.288" PeakDensity="151985.11" PeakScaleHeight="62.188" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
