<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 20:10:00.000"
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) 20:10:00</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">
FF202605702262010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.337" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.300" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="9.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.000" 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="2.197" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="407.869" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="270.243" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.442" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="187.791" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.686" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="97.279" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="200.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.760" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="141">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.2 10.25 10.3 10.35 10.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 251.667 253.333 255.000 260.000 261.000 262.000 263.000 264.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 277.500 280.000 280.000 280.000 281.667 283.333 285.000 285.000 288.333 291.667 295.000 295.000 295.000 295.000 295.000 300.000 302.500 305.000 307.500 310.000 310.000 310.000 315.000 317.500 320.000 320.000 321.667 323.333 325.000 325.000 328.333 331.667 335.000 335.000 335.000 335.000 340.000 342.500 345.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 420.000 420.000 430.000 430.000 435.000 440.000 440.000 450.000 455.000 460.000 460.000 465.000 465.000 475.000 475.000 480.000 480.000 490.000 490.000 495.000 500.000 500.000 505.000 510.000 515.000 520.000 520.000 530.000 530.000 535.000 540.000 545.000 555.000 562.143 569.286 576.429 583.571 590.714 597.857 605.000 610.000 615.000 625.000 635.000 648.333 661.667 675.962 691.607 708.804 727.793
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 63 57 60 0 63 60 57 0 0 57 51 0 0 0 0 66 66 66 63 66 0 60 57 0 0 0 63 66 63 0 0 63 0 0 0 63 66 0 63 0 66 0 66 0 63 66 69 63 48 57 63 0 0 63 66 0 0 54 63 66 66 66 0 66 66 66 69 66 69 63 69 63 69 63 69 66 60 66 60 69 66 60 69 66 66 69 66 66 69 69 69 66 66 69 69 66 66 63 60 66 66 66 63 66 69 69 66 66 69 69 66 63 66 66 66 63 63 60 60 0 57 60 0 0 0 0 0 0 54 54 54 51 51 48 48 45 45 42 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 -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 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 2.734375 -0.390625 -1.953125 -1.953125 1.171875 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125
</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" >
89.709 90.0 95.0 100.0 105.0 110.0 115.0 117.142 120.0 124.283 125.0 130.0 131.425 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 407.869 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.225 1.474 1.903 2.126 2.197 2.134 2.068 2.068 2.068 2.081 2.171 2.197 2.289 2.415 2.542 2.674 2.813 2.961 3.121 3.295 3.484 3.69 3.911 4.146 4.388 4.632 4.874 5.11 5.337 5.555 5.765 5.966 6.159 6.345 6.524 6.698 6.867 7.031 7.19 7.346 7.499 7.649 7.795 7.939 8.081 8.221 8.358 8.493 8.627 8.759 8.889 9.017 9.143 9.267 9.389 9.508 9.624 9.737 9.846 9.949 10.046 10.136 10.216 10.284 10.338 10.376 10.397 10.4 10.4 10.395 10.385 10.37 10.35 10.326 10.297 10.264 10.227 10.186 10.142 10.094 10.042 9.987 9.93 9.869 9.806 9.74 9.672 9.601 9.529 9.454 9.378 9.299 9.22 9.138 9.056 8.972 8.887 8.801 8.714 8.627 8.538 8.449 8.359 8.269 8.179 8.088 7.997 7.906 7.815 7.724 7.632 7.541 7.45 7.359 7.269 7.178 7.088 6.999 6.91 6.821 6.732 6.645 6.557 6.471 6.385 6.299 6.214 6.13 6.046 5.964 5.881 5.8 5.719 5.64 5.56 5.482 5.405 5.328 5.252 5.177 5.102 5.029 4.956 4.884 4.813 4.743 4.673 4.605 4.537 4.47 4.404 4.338 4.274 4.21 4.147 4.085 4.024 3.964 3.904 3.845 3.787 3.73 3.673 3.617 3.562 3.508 3.455 3.402 3.35 3.298 3.248 3.198 3.149 3.1 3.053 3.006 2.959 2.913 2.868 2.824 2.78 2.737 2.695 2.653 2.611 2.571 2.531

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.197" PeakHeight="110.0" Num="3" Error="0.0">
-29.349 11.5 -2.442
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.197" EndFrequency="10.4" PeakHeight="407.869" Num="5" zHalfNm="270.243" Error="7.923">
-270.565 -17.737 24.436 -17.911 5.333
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="21.425" Depth="0.129"/>
<TopsideChapman PeakHeight="407.869" PeakDensity="1341935.5" PeakScaleHeight="97.279" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
