<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-03 -093 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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.04.03 (093) 19:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609304031910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.658" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.964" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="10.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="456.875" 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="2.634" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="350.993" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="260.607" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.318" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.694" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.881" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.210" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="140.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.520" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="168">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 225.000 227.500 230.000 235.000 232.500 230.000 235.000 235.000 235.000 240.000 241.250 242.500 243.750 245.000 245.000 245.000 245.000 245.000 246.429 247.857 249.286 250.714 252.143 253.571 255.000 260.000 260.000 260.000 265.000 265.000 267.500 270.000 270.000 270.000 271.667 273.333 275.000 280.000 280.000 281.667 283.333 285.000 286.667 288.333 290.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 300.000 300.000 305.000 306.667 308.333 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 317.143 319.286 321.429 323.571 325.714 327.857 330.000 330.000 330.000 335.000 335.000 335.000 335.000 337.500 340.000 342.500 345.000 345.000 345.000 345.000 345.000 350.000 350.000 352.500 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 412.500 415.000 417.000 419.000 421.000 423.000 425.000 428.333 431.667 435.000 435.000 438.125 441.250 444.375 447.500 450.625 453.750 456.875 460.000 465.000 470.000 475.000 478.750 482.500 486.250 492.715 499.687 507.229 515.412 524.323 534.063 544.754 556.541 569.603
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 51 0 54 48 0 57 60 57 57 0 0 0 0 51 54 0 57 51 0 60 0 0 0 0 45 57 54 48 60 60 0 63 60 57 0 0 63 60 63 0 0 0 0 0 0 63 0 66 66 63 60 66 0 63 63 0 66 0 63 0 57 66 0 0 66 66 66 0 63 69 69 66 0 51 0 0 0 0 57 63 66 54 57 63 69 0 63 45 51 60 63 72 69 66 69 57 63 69 54 63 66 69 63 66 57 63 69 69 66 69 60 66 66 69 66 66 63 51 60 63 66 63 63 57 63 66 60 63 54 60 63 45 60 60 0 60 0 51 54 51 0 51 51 48 0 48 51 42 48 51 51 0 0 0 0 0 0 0 0 0 0 0 45 51 51 45
</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 -2.734375 -0.390625 -0.390625 1.953125 -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 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -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 1.953125 -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" >
89.612 90.0 95.0 100.0 105.0 110.0 114.922 115.0 119.844 120.0 124.766 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 350.993 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.769 2.28 2.549 2.634 2.511 2.511 2.511 2.515 2.634 2.64 2.775 2.908 3.042 3.179 3.32 3.467 3.621 3.783 3.953 4.133 4.323 4.524 4.736 4.958 5.19 5.43 5.677 5.929 6.185 6.442 6.7 6.957 7.212 7.465 7.716 7.964 8.208 8.45 8.689 8.925 9.159 9.389 9.617 9.842 10.063 10.281 10.493 10.7 10.899 11.087 11.259 11.41 11.531 11.613 11.649 11.65 11.646 11.629 11.6 11.559 11.508 11.446 11.375 11.295 11.206 11.11 11.007 10.897 10.782 10.66 10.535 10.404 10.27 10.132 9.991 9.848 9.702 9.555 9.406 9.255 9.104 8.952 8.8 8.647 8.495 8.342 8.191 8.04 7.889 7.74 7.592 7.445 7.299 7.155 7.013 6.872 6.732 6.595 6.459 6.325 6.193 6.063 5.935 5.809 5.685 5.562 5.442 5.325 5.209 5.095 4.983 4.873 4.766 4.66 4.556 4.455 4.355 4.257 4.161 4.068 3.976 3.886 3.797 3.711 3.626 3.544 3.463 3.383 3.306 3.23 3.155 3.083 3.012 2.942 2.874 2.807 2.742 2.679 2.617 2.556 2.496 2.438 2.381 2.326 2.271 2.218 2.167 2.116 2.066 2.018 1.971 1.925 1.88 1.835 1.792 1.75 1.709 1.669 1.63 1.591 1.554 1.517 1.482 1.447 1.413 1.38 1.347 1.315 1.284 1.254 1.224 1.196 1.167 1.14 1.113 1.087 1.061 1.036 1.012 0.988 0.964 0.942 0.919 0.898 0.876 0.856

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.634" PeakHeight="110.0" Num="3" Error="0.0">
-29.855 12.211 -2.744
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.634" EndFrequency="11.65" PeakHeight="350.993" Num="5" zHalfNm="260.607" Error="4.006">
-193.475 -40.395 12.752 -8.03 2.921
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.766" Depth="0.123"/>
<TopsideChapman PeakHeight="350.993" PeakDensity="1683902.0" PeakScaleHeight="65.21" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
