<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 22:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.02.11 (042) 22:00:00</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">
FF202604202112200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.389" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.573" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.411" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="452.518" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="376.446" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.910" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="111.937" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.920" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.702" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="114.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.790" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="149">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.1 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 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 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.833 351.667 352.500 353.333 354.167 355.000 350.000 350.000 350.000 351.875 353.750 355.625 357.500 359.375 361.250 363.125 365.000 365.000 365.000 367.500 370.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 380.000 380.000 382.500 385.000 385.000 385.000 386.250 387.500 388.750 390.000 392.500 395.000 395.000 395.000 400.000 400.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 405.000 406.250 407.500 408.750 410.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 422.500 425.000 425.000 430.000 430.000 431.667 433.333 435.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 450.000 455.000 455.000 455.000 460.000 460.000 461.667 463.333 465.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 505.000 510.000 515.000 515.000 520.000 525.000 525.000 530.000 535.000 535.000 540.000 540.000 550.000 555.000 560.000 560.000 565.000 570.000 575.000 581.479 588.936 597.610 607.828 620.040 634.894
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 63 0 69 0 0 0 0 66 69 0 0 0 0 0 0 63 57 51 0 0 0 0 0 0 0 60 63 69 0 57 69 69 69 48 0 66 60 0 63 66 0 63 69 0 54 60 0 66 0 51 0 63 0 66 54 60 0 66 51 57 63 63 0 54 60 0 63 54 0 0 0 66 63 66 69 60 66 69 66 0 66 66 57 60 0 0 63 66 66 57 63 51 57 63 54 60 63 57 60 60 57 63 0 0 60 63 63 66 66 69 63 69 60 66 57 66 69 63 66 63 66 63 60 63 60 60 60 57 57 60 60 60 60 60 57 54 51 57 57 57 54 54 51 0 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 1.171875 -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 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 2.734375 2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.523 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.152 140.0 145.0 150.0 155.0 160.0 165.0 168.305 170.0 175.0 180.0 185.0 190.0 195.0 197.457 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 452.518 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.272 0.356 0.398 0.411 0.406 0.392 0.367 0.329 0.272 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.248 0.285 0.321 0.357 0.393 0.411 0.452 0.522 0.588 0.655 0.724 0.797 0.875 0.959 1.049 1.147 1.253 1.368 1.492 1.627 1.772 1.928 2.094 2.272 2.459 2.656 2.862 3.077 3.3 3.529 3.765 4.006 4.253 4.504 4.759 5.017 5.278 5.541 5.806 6.073 6.339 6.605 6.87 7.133 7.392 7.646 7.894 8.133 8.361 8.576 8.774 8.954 9.11 9.24 9.341 9.41 9.446 9.45 9.448 9.434 9.407 9.368 9.317 9.256 9.184 9.103 9.015 8.918 8.815 8.705 8.59 8.469 8.345 8.217 8.085 7.951 7.814 7.675 7.536 7.395 7.253 7.111 6.968 6.826 6.684 6.543 6.403 6.264 6.126 5.989 5.854 5.72 5.589 5.458 5.33 5.204 5.08 4.958 4.838 4.72 4.604 4.49 4.379 4.27 4.163 4.058 3.955 3.855 3.757 3.661 3.567 3.475 3.385 3.298 3.212 3.129 3.047 2.967 2.89 2.814 2.74 2.668 2.597 2.529 2.462 2.396 2.333 2.271 2.21 2.151 2.094 2.038 1.984 1.931 1.879 1.829 1.779 1.732 1.685 1.64 1.596 1.553 1.511 1.47 1.431 1.392 1.355 1.318 1.283 1.248 1.214 1.181 1.149 1.118 1.088 1.059 1.03 1.002 0.975 0.949 0.923 0.898 0.874 0.85 0.827 0.805 0.783 0.761

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.411" PeakHeight="110.0" Num="3" Error="0.0">
-20.499 3.26 -0.238
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.411" EndFrequency="9.45" PeakHeight="452.518" Num="5" zHalfNm="376.446" Error="4.914">
-242.586 -20.903 9.57 -4.115 2.973
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.457" Depth="0.211"/>
<TopsideChapman PeakHeight="452.518" PeakDensity="1107971.5" PeakScaleHeight="56.702" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
