<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 19:50:00.000"
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" >
2026.03.24 (083) 19:50:00</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">
FF202608303241950009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.530" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.850" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="10.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" 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="2.327" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="382.341" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="281.087" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.701" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="139.815" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.074" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="73.618" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="154.440" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.620" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="173">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.2 3.25 3.3 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 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 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 235.000 237.500 240.000 242.500 245.000 250.000 255.000 254.000 253.000 252.000 251.000 250.000 250.000 255.000 255.000 255.000 256.667 258.333 260.000 261.667 263.333 265.000 270.000 267.500 265.000 265.000 268.333 271.667 275.000 275.000 275.000 275.000 275.000 280.000 280.000 285.000 285.000 285.000 286.429 287.857 289.286 290.714 292.143 293.571 295.000 295.000 295.000 297.500 300.000 300.000 305.000 305.000 305.000 305.000 310.000 315.000 312.500 310.000 315.000 316.667 318.333 320.000 320.000 321.667 323.333 325.000 325.000 327.500 330.000 335.000 335.000 335.000 337.500 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 381.250 382.500 383.750 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 407.500 410.000 410.000 410.000 412.500 415.000 415.000 415.000 417.500 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 440.000 440.000 442.500 445.000 447.500 450.000 450.000 452.500 455.000 460.000 460.000 462.500 465.000 470.000 465.000 475.000 477.500 480.000 485.000 490.000 490.000 495.000 500.000 505.000 505.000 510.000 515.000 525.000 530.000 535.000 540.000 547.500 555.000 565.000 576.250 587.500 602.037 619.235 639.897
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 0 57 0 57 48 0 0 0 0 0 60 54 57 57 57 0 0 0 0 0 60 0 0 57 51 0 0 60 60 0 57 54 60 60 57 57 60 0 0 0 0 0 0 60 60 60 0 66 69 72 78 78 75 72 0 0 0 60 0 0 60 63 0 0 60 66 0 63 51 57 66 51 63 0 72 60 69 75 78 69 75 75 69 72 72 66 69 60 66 66 54 60 0 69 60 63 51 60 0 0 0 57 51 54 60 51 57 66 60 69 54 66 72 54 63 66 72 57 63 63 66 57 63 63 57 63 60 63 63 0 60 63 51 54 0 51 0 51 57 51 54 48 51 0 54 48 0 51 48 54 54 51 51 54 51 51 48 45 45 45 48 48 48 0 45 45 48 0 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -2.734375 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 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 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -1.953125 1.171875
</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" >
89.678 90.0 95.0 100.0 105.0 110.0 115.0 116.46 120.0 122.92 125.0 129.38 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 382.341 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.561 2.015 2.252 2.327 2.251 2.2 2.2 2.2 2.241 2.327 2.342 2.465 2.589 2.715 2.845 2.98 3.12 3.267 3.422 3.585 3.756 3.937 4.127 4.326 4.534 4.751 4.974 5.204 5.439 5.677 5.918 6.16 6.403 6.645 6.886 7.125 7.363 7.599 7.833 8.065 8.294 8.522 8.747 8.969 9.19 9.407 9.623 9.835 10.044 10.249 10.45 10.645 10.834 11.014 11.184 11.341 11.482 11.602 11.697 11.763 11.796 11.8 11.799 11.788 11.767 11.737 11.698 11.65 11.595 11.531 11.461 11.384 11.3 11.211 11.116 11.016 10.912 10.803 10.691 10.574 10.455 10.333 10.208 10.081 9.952 9.821 9.688 9.555 9.42 9.285 9.149 9.012 8.875 8.738 8.602 8.465 8.329 8.193 8.058 7.924 7.79 7.658 7.526 7.395 7.266 7.138 7.011 6.885 6.761 6.638 6.516 6.396 6.278 6.161 6.046 5.932 5.82 5.709 5.601 5.493 5.388 5.284 5.181 5.081 4.981 4.884 4.788 4.694 4.601 4.51 4.421 4.333 4.246 4.161 4.078 3.996 3.916 3.837 3.76 3.684 3.609 3.536 3.464 3.394 3.325 3.257 3.19 3.125 3.061 2.999 2.937 2.877 2.818 2.76 2.703 2.647 2.593 2.539 2.487 2.435 2.385 2.336 2.287 2.24 2.193 2.148 2.103 2.06 2.017 1.975 1.934 1.894 1.854 1.816 1.778 1.741 1.705 1.669 1.634 1.6 1.567 1.534 1.502 1.471 1.44 1.41

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.327" PeakHeight="110.0" Num="3" Error="0.0">
-29.513 11.728 -2.537
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.327" EndFrequency="11.8" PeakHeight="382.341" Num="5" zHalfNm="281.087" Error="4.091">
-225.086 -35.594 13.177 -8.154 2.696
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.38" Depth="0.127"/>
<TopsideChapman PeakHeight="382.341" PeakDensity="1727543.4" PeakScaleHeight="73.618" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
