<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-25 -056 20:30:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2o cusp</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" >
2026.02.25 (056) 20:30:00</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">
FF202605602252030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.263" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.158" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" 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="8.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="536.250" 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="1.943" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="430.157" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.814" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.365" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.600" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="211.912" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.501" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="110.001" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="219.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.910" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.350" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 260.000 260.000 260.000 261.250 262.500 263.750 265.000 265.000 267.500 270.000 272.500 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 290.000 290.000 290.000 290.000 290.000 300.000 300.000 301.250 302.500 303.750 305.000 310.000 310.000 310.000 310.000 315.000 320.000 320.000 323.333 326.667 330.000 332.500 335.000 337.500 340.000 340.000 340.000 340.000 344.000 348.000 352.000 356.000 360.000 360.000 365.000 365.000 370.000 375.000 380.000 385.000 390.000 390.000 390.000 400.000 400.000 405.000 405.000 410.000 415.000 420.000 425.000 432.500 440.000 445.000 448.750 452.500 456.250 460.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 530.000 530.000 536.250 542.500 548.750 555.000 560.000 565.000 570.000 580.000 580.000 585.000 595.000 605.000 610.000 620.000 629.968 641.015 653.327 667.134 682.725 700.471 720.851 744.499 772.269 805.342
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 51 60 0 0 0 54 57 0 51 0 0 0 0 54 51 51 0 57 0 0 48 0 51 51 51 57 0 45 60 0 45 0 60 60 66 66 0 51 57 63 0 0 60 51 0 0 57 69 69 60 63 0 63 0 66 63 63 60 57 66 63 57 57 60 54 60 63 63 60 48 54 57 57 0 57 57 0 0 0 66 66 66 66 63 66 66 66 69 69 69 72 69 63 57 66 0 57 0 60 57 57 57 57 63 63 66 69 69 66 66 63 63 63 63 60 63 54 57 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -1.953125 -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 -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 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 1.953125 -1.171875 -0.390625 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 100.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 107.500 110.000 110.000 110.000 110.000 110.000 110.000 110.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 51 54 63 0 0 0 63 0 0 69 69 51 66 63 0 0 0 0 0 54
</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
</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" >
89.777 90.0 95.0 100.0 105.0 110.0 115.0 118.531 120.0 125.0 127.061 130.0 135.0 135.592 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 430.157 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.219 1.302 1.683 1.88 1.943 1.898 1.809 1.809 1.809 1.809 1.855 1.934 1.943 2.036 2.143 2.252 2.367 2.49 2.623 2.767 2.927 3.103 3.296 3.505 3.727 3.955 4.184 4.407 4.621 4.826 5.022 5.208 5.385 5.555 5.719 5.876 6.027 6.174 6.316 6.455 6.59 6.721 6.85 6.976 7.099 7.22 7.339 7.456 7.571 7.683 7.794 7.903 8.01 8.115 8.219 8.32 8.419 8.515 8.609 8.7 8.788 8.872 8.952 9.027 9.096 9.158 9.214 9.261 9.299 9.327 9.344 9.35 9.35 9.348 9.343 9.334 9.321 9.306 9.287 9.265 9.239 9.211 9.181 9.147 9.111 9.073 9.032 8.989 8.943 8.896 8.847 8.795 8.743 8.688 8.632 8.574 8.515 8.455 8.393 8.33 8.266 8.202 8.136 8.069 8.002 7.934 7.865 7.795 7.725 7.655 7.584 7.513 7.441 7.369 7.297 7.225 7.152 7.08 7.007 6.935 6.862 6.79 6.717 6.645 6.573 6.501 6.429 6.358 6.287 6.216 6.145 6.075 6.005 5.935 5.866 5.797 5.729 5.661 5.593 5.526 5.46 5.394 5.328 5.263 5.199 5.135 5.071 5.008 4.946 4.884 4.823 4.762 4.702 4.642 4.583 4.524 4.467 4.409 4.353 4.296 4.241 4.186 4.131 4.078 4.024 3.972 3.92 3.868 3.817 3.767 3.717 3.668 3.619 3.571 3.523 3.476 3.43 3.384 3.338 3.294 3.249 3.206 3.162 3.12 3.078 3.036 2.995

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.943" PeakHeight="110.0" Num="3" Error="0.0">
-28.978 10.996 -2.241
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.943" EndFrequency="9.35" PeakHeight="430.157" Num="5" zHalfNm="275.814" Error="6.19">
-300.45 -2.013 20.759 -18.119 5.258
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.592" Depth="0.134"/>
<TopsideChapman PeakHeight="430.157" PeakDensity="1084646.4" PeakScaleHeight="110.001" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
