<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-24 -055 12:30:00.000"
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" >
2026.02.24 (055) 12:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605502241230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.467" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.194" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="385.000" 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="3.119" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.232" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="368.412" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="231.067" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.069" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="178.749" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.625" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="97.477" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="210.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 210.000 210.000 211.667 213.333 215.000 216.667 218.333 220.000 226.875 233.750 240.625 247.500 254.375 261.250 268.125 275.000 280.000 284.167 288.333 292.500 296.667 300.833 305.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 332.500 335.000 340.000 345.000 345.000 345.000 345.000 350.000 355.000 355.000 357.500 360.000 365.000 365.000 370.000 370.000 380.000 382.500 385.000 385.000 385.000 390.000 395.000 400.000 405.000 410.000 415.000 420.000 425.000 430.000 435.000 435.000 440.000 450.000 450.000 455.000 460.000 465.000 475.000 480.000 485.000 490.000 495.000 505.000 510.000 515.000 525.000 530.000 535.000 540.000 545.000 552.289 560.237 568.940 578.510 589.082 600.824 613.940 628.688 645.391 664.466 686.457
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 51 0 0 0 0 0 48 0 0 0 0 0 48 0 51 48 0 45 0 0 0 48 51 48 54 57 0 54 60 0 0 63 66 66 63 63 57 60 60 57 60 60 0 60 57 48 0 60 57 0 60 63 0 66 63 63 63 60 51 0 54 63 57 60 60 0 60 57 54 51 54 51 51 63 63 54 60 60 60 60 63 60 57 57 54 60 60 60 51 54 57 57 57 54 54 54 54 54 51 51 48 48 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 -2.734375 0.390625 -0.390625 2.734375 -2.734375 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -1.953125 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 2.734375 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 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.526 90.0 95.0 100.0 105.0 110.0 112.694 115.0 115.387 118.081 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 368.412 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.097 2.7 3.018 3.119 2.997 2.997 2.997 3.119 3.175 3.318 3.459 3.601 3.745 3.893 4.044 4.201 4.361 4.526 4.693 4.863 5.033 5.203 5.372 5.539 5.703 5.864 6.021 6.175 6.326 6.473 6.617 6.757 6.895 7.029 7.161 7.291 7.418 7.543 7.665 7.786 7.905 8.022 8.137 8.25 8.361 8.47 8.577 8.681 8.783 8.881 8.975 9.064 9.146 9.22 9.285 9.337 9.375 9.396 9.4 9.4 9.396 9.387 9.374 9.357 9.336 9.31 9.281 9.248 9.212 9.172 9.129 9.083 9.034 8.982 8.928 8.871 8.812 8.751 8.688 8.622 8.555 8.487 8.416 8.345 8.272 8.197 8.122 8.045 7.968 7.89 7.811 7.731 7.651 7.57 7.489 7.407 7.326 7.244 7.161 7.079 6.997 6.915 6.832 6.75 6.668 6.586 6.505 6.424 6.343 6.262 6.182 6.102 6.023 5.944 5.866 5.788 5.711 5.634 5.558 5.482 5.408 5.333 5.26 5.187 5.115 5.043 4.972 4.902 4.833 4.764 4.696 4.629 4.562 4.496 4.431 4.367 4.303 4.241 4.179 4.117 4.057 3.997 3.938 3.879 3.822 3.765 3.709 3.653 3.598 3.544 3.491 3.438 3.386 3.335 3.285 3.235 3.186 3.137 3.089 3.042 2.996 2.95 2.905 2.86 2.816 2.773 2.73 2.688 2.647 2.606 2.566 2.526 2.487 2.448 2.411 2.373 2.336 2.3 2.264 2.229 2.194 2.16 2.126 2.093 2.06 2.028

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.119" PeakHeight="110.0" Num="3" Error="0.0">
-30.293 12.846 -3.027
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.119" EndFrequency="9.4" PeakHeight="368.412" Num="5" zHalfNm="231.067" Error="8.373">
-232.724 -30.841 20.499 -9.978 2.713
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.081" Depth="0.122"/>
<TopsideChapman PeakHeight="368.412" PeakDensity="1096277.9" PeakScaleHeight="97.477" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
