<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 19:10:00.000"
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" >
2026.02.26 (057) 19:10:00</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">
FF202605702261910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.412" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.481" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.000" 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="2.716" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="382.172" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="264.479" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.594" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="153.210" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.617" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="81.638" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="190.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="120">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 251.667 253.333 255.000 260.000 260.000 265.000 265.000 265.000 270.000 270.000 272.500 275.000 275.000 277.500 280.000 283.000 286.000 289.000 292.000 295.000 295.000 300.000 305.000 305.000 305.000 310.000 315.000 315.000 315.000 317.500 320.000 325.000 330.000 335.000 335.000 337.000 339.000 341.000 343.000 345.000 345.000 355.000 355.000 355.000 360.000 360.000 360.000 363.333 366.667 370.000 375.000 377.500 380.000 382.500 385.000 387.500 390.000 395.000 395.000 400.000 400.000 402.500 405.000 410.000 410.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 450.000 460.000 460.000 465.000 465.000 475.000 475.000 480.000 485.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 515.000 515.000 520.000 520.000 525.000 530.000 530.000 535.000 540.000 540.000 545.000 545.000 555.000 560.000 565.000 570.000 575.000 581.886 589.622 598.375 608.360 619.858 633.239
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 0 0 51 48 45 48 54 51 51 48 0 51 0 0 51 0 51 0 0 57 54 0 45 57 54 57 54 0 60 51 57 63 48 48 54 0 57 0 0 63 63 54 66 69 66 66 63 45 0 0 60 0 0 48 0 0 51 48 57 54 60 0 60 57 63 60 54 63 57 51 60 57 66 63 69 66 60 63 63 63 63 63 60 57 60 60 57 54 63 60 63 60 63 63 57 48 57 48 54 54 45 54 51 51 54 54 57 57 54 54 51 51 51 48 48 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 1.171875 -0.390625 -0.390625 -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 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 1.953125 0.390625 -0.390625
</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" >
89.596 90.0 95.0 100.0 105.0 110.0 114.528 115.0 119.056 120.0 123.584 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 382.172 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.233 1.825 2.351 2.628 2.716 2.593 2.593 2.593 2.619 2.716 2.75 2.871 2.996 3.126 3.263 3.405 3.554 3.711 3.874 4.042 4.216 4.394 4.574 4.754 4.935 5.113 5.29 5.464 5.636 5.804 5.969 6.13 6.289 6.446 6.599 6.751 6.9 7.047 7.192 7.336 7.478 7.619 7.76 7.899 8.037 8.175 8.312 8.449 8.586 8.723 8.86 8.996 9.133 9.269 9.404 9.539 9.671 9.798 9.917 10.022 10.102 10.145 10.15 10.149 10.141 10.126 10.105 10.077 10.043 10.003 9.958 9.908 9.852 9.792 9.728 9.659 9.587 9.51 9.431 9.348 9.263 9.175 9.084 8.992 8.897 8.8 8.702 8.603 8.502 8.399 8.296 8.192 8.088 7.983 7.877 7.771 7.665 7.559 7.453 7.347 7.241 7.136 7.03 6.926 6.822 6.718 6.615 6.512 6.411 6.31 6.21 6.111 6.012 5.915 5.819 5.723 5.629 5.536 5.443 5.352 5.262 5.173 5.085 4.998 4.912 4.828 4.745 4.662 4.581 4.501 4.422 4.345 4.268 4.193 4.118 4.045 3.973 3.902 3.832 3.764 3.696 3.629 3.564 3.499 3.436 3.374 3.312 3.252 3.193 3.135 3.077 3.021 2.965 2.911 2.857 2.805 2.753 2.702 2.653 2.604 2.555 2.508 2.462 2.416 2.371 2.327 2.284 2.241 2.199 2.159 2.118 2.079 2.04 2.002 1.964 1.928 1.892 1.856 1.821 1.787 1.754 1.721 1.689 1.657 1.626 1.595 1.565

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.716" PeakHeight="110.0" Num="3" Error="0.0">
-29.937 12.328 -2.795
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.716" EndFrequency="10.15" PeakHeight="382.172" Num="5" zHalfNm="264.479" Error="2.66">
-222.963 -56.269 32.151 -14.463 2.956
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.584" Depth="0.123"/>
<TopsideChapman PeakHeight="382.172" PeakDensity="1278194.8" PeakScaleHeight="81.638" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
