<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 16:30:00.000"
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 F2x 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" >
2026.03.26 (085) 16:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608503261630009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.553" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.825" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" 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="3.322" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.329" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="357.045" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="238.043" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.904" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="157.522" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.514" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="86.227" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="182.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="122">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 250.000 252.500 255.000 260.000 260.000 265.000 270.000 273.000 276.000 279.000 282.000 285.000 288.000 291.000 294.000 297.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 335.000 330.000 330.000 335.000 340.000 340.000 342.500 345.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 465.000 470.000 475.000 475.000 480.000 480.000 490.000 495.000 500.000 505.000 510.000 515.000 525.000 530.000 535.000 545.000 555.000 565.000 580.000 595.000 610.000 630.000 653.348
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 45 0 51 48 51 48 48 0 0 0 0 0 51 0 48 0 51 51 51 51 54 51 51 0 54 54 54 57 60 63 60 60 60 60 63 57 54 48 0 51 57 48 54 60 63 63 45 63 63 63 51 57 0 57 60 63 66 63 66 60 66 60 63 63 63 66 63 54 60 63 60 63 60 63 63 57 63 57 63 60 63 63 57 63 60 60 60 57 51 57 57 51 57 57 57 57 57 54 51 45 57 54 54 54 51 54 51 51 51 51 51 51 48 42 48 48 0 48 0 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -2.734375 2.734375 1.171875 -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 2.734375 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 -1.953125 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" >
89.494 90.0 95.0 100.0 105.0 110.0 111.831 113.661 115.0 115.492 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 357.045 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.235 2.875 3.214 3.322 3.199 3.199 3.289 3.322 3.472 3.627 3.777 3.926 4.076 4.228 4.384 4.544 4.709 4.88 5.056 5.238 5.424 5.615 5.81 6.008 6.208 6.409 6.61 6.81 7.009 7.206 7.4 7.592 7.781 7.967 8.15 8.33 8.507 8.681 8.851 9.019 9.183 9.345 9.503 9.657 9.808 9.954 10.095 10.231 10.359 10.479 10.588 10.686 10.768 10.832 10.876 10.898 10.9 10.899 10.891 10.877 10.856 10.829 10.796 10.757 10.713 10.664 10.61 10.551 10.488 10.421 10.35 10.275 10.197 10.115 10.031 9.944 9.855 9.763 9.669 9.573 9.475 9.375 9.274 9.172 9.069 8.964 8.859 8.753 8.647 8.54 8.432 8.325 8.217 8.109 8.001 7.893 7.786 7.678 7.571 7.465 7.358 7.253 7.148 7.043 6.94 6.837 6.735 6.633 6.533 6.433 6.334 6.236 6.139 6.044 5.949 5.855 5.762 5.67 5.579 5.489 5.401 5.313 5.227 5.141 5.057 4.974 4.892 4.811 4.731 4.652 4.575 4.498 4.422 4.348 4.275 4.202 4.131 4.061 3.992 3.924 3.857 3.791 3.726 3.662 3.599 3.537 3.476 3.416 3.357 3.299 3.241 3.185 3.13 3.075 3.022 2.969 2.917 2.866 2.816 2.767 2.718 2.67 2.623 2.577 2.532 2.487 2.444 2.401 2.358 2.317 2.276 2.235 2.196 2.157 2.119 2.081 2.044 2.008 1.973 1.938 1.903 1.869 1.836 1.804 1.771 1.74

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.322" PeakHeight="110.0" Num="3" Error="0.0">
-30.452 13.079 -3.133
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.322" EndFrequency="10.9" PeakHeight="357.045" Num="5" zHalfNm="238.043" Error="5.093">
-218.631 -31.992 12.885 -6.491 2.676
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.492" Depth="0.123"/>
<TopsideChapman PeakHeight="357.045" PeakDensity="1474069.5" PeakScaleHeight="86.227" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
