<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-05 -064 20:40:00.000"
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" >
2026.03.05 (064) 20:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606403052040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="13.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.888" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="37.982" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.550" 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="12.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="436.520" 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="1.754" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="333.724" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="281.460" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.580" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="74.783" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.725" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.119" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="90.080" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="207">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 246.000 247.000 248.000 249.000 250.000 250.000 251.250 252.500 253.750 255.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 257.000 259.000 260.200 261.400 262.600 263.800 265.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 265.000 268.333 271.667 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 281.250 282.500 283.750 285.000 285.000 285.000 290.000 292.500 295.000 295.000 290.000 291.250 292.500 293.750 295.000 295.000 300.000 300.000 300.000 300.000 305.000 306.667 308.333 310.000 305.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 321.250 322.500 323.750 325.000 325.000 325.000 327.500 330.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 336.667 338.333 340.000 340.000 335.000 335.000 337.500 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 351.250 352.500 353.750 355.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 360.000 361.250 362.500 363.750 365.000 365.000 365.000 365.000 365.000 370.000 372.500 375.000 375.000 375.000 375.000 370.000 372.500 375.000 375.000 375.000 375.000 375.000 385.000 385.000 385.000 385.000 390.000 387.500 385.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 401.667 403.333 405.000 405.000 407.500 410.000 405.000 408.333 411.667 415.000 420.000 420.000 425.000 425.000 425.000 427.500 429.203 431.208 433.605 436.520 440.143 444.765 450.867 459.297
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 48 0 54 0 0 57 57 0 0 0 51 60 0 63 60 63 51 66 0 63 60 0 0 0 0 0 0 66 66 0 57 69 0 60 60 63 48 0 0 63 66 66 66 66 66 66 66 66 57 0 0 0 69 69 69 66 0 57 63 69 0 51 0 69 69 66 0 0 69 66 0 48 54 69 66 0 0 72 72 69 45 51 69 72 72 72 0 0 0 66 69 72 0 60 72 72 72 75 75 75 75 75 72 72 72 72 72 0 0 75 75 75 57 0 75 75 72 72 0 78 78 75 69 0 69 75 72 69 66 0 0 0 69 72 72 72 69 69 0 69 69 69 69 66 0 0 0 66 66 63 0 60 60 0 48 51 0 57 60 0 60 0 57 0 0 48 0 0 60 45 0 57 57 60 60 54 60 60 60 57 60 60 0 0 60 60 0 63 0 63 0 0 60 57 60 57 0 0 0 0 48 54 0 51 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -1.953125 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -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 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="169">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.837 90.0 95.0 100.0 105.0 110.0 115.0 119.627 120.0 125.0 129.253 130.0 135.0 138.88 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 333.724 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.214 1.174 1.519 1.698 1.754 1.718 1.616 1.616 1.616 1.616 1.627 1.698 1.754 1.782 1.911 2.043 2.18 2.324 2.476 2.637 2.808 2.99 3.185 3.393 3.614 3.849 4.099 4.363 4.642 4.933 5.237 5.553 5.88 6.216 6.561 6.914 7.275 7.643 8.018 8.399 8.787 9.182 9.583 9.992 10.406 10.827 11.253 11.68 12.102 12.503 12.853 13.09 13.15 13.149 13.116 13.045 12.937 12.797 12.629 12.436 12.221 11.988 11.739 11.477 11.205 10.924 10.638 10.347 10.054 9.759 9.465 9.172 8.882 8.595 8.311 8.033 7.759 7.491 7.229 6.974 6.724 6.481 6.245 6.016 5.793 5.578 5.369 5.166 4.971 4.781 4.599 4.422 4.252 4.087 3.929 3.776 3.629 3.487 3.351 3.219 3.093 2.971 2.854 2.741 2.633 2.528 2.428 2.332 2.239 2.15 2.065 1.982 1.903 1.828 1.755 1.685 1.617 1.553 1.491 1.431 1.374 1.319 1.266 1.215 1.167 1.12 1.075 1.032 0.991 0.951 0.913 0.876 0.841 0.807 0.775 0.744 0.714 0.685 0.658 0.632 0.606 0.582 0.559 0.536 0.515 0.494 0.474 0.455 0.437 0.419 0.402 0.386 0.371 0.356 0.342 0.328 0.315 0.302 0.29 0.278 0.267 0.256 0.246 0.236 0.227 0.218 0.209 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.754" PeakHeight="110.0" Num="3" Error="0.0">
-28.652 10.565 -2.076
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.754" EndFrequency="13.15" PeakHeight="333.724" Num="5" zHalfNm="281.46" Error="3.138">
-151.935 -52.713 13.861 -5.895 1.838
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.88" Depth="0.138"/>
<TopsideChapman PeakHeight="333.724" PeakDensity="2145440.5" PeakScaleHeight="38.119" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
