<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 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 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" >
2026.03.19 (078) 19:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607803191910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.811" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.651" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" 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="2.679" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="328.738" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.651" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.640" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="91.056" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.619" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.671" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="128.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" 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" >
4.5 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 281.667 283.333 285.000 286.667 288.333 290.000 291.667 293.333 295.000 296.667 298.333 300.000 302.500 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 311.250 312.500 313.750 315.000 315.000 316.667 318.333 320.000 321.667 323.333 325.000 325.000 325.000 326.458 327.917 329.375 330.833 332.292 333.750 335.208 336.667 338.125 339.583 341.042 342.500 343.958 345.417 346.875 348.333 349.792 351.250 352.708 354.167 355.625 357.083 358.542 360.000 365.000 365.000 365.000 365.000 368.333 371.667 375.000 375.000 376.071 377.143 378.214 379.286 380.357 381.429 382.500 383.571 384.643 385.714 386.786 387.857 388.929 390.000 390.000 390.000 390.000 391.250 392.500 393.750 395.000 400.000 401.364 402.727 404.091 405.455 406.818 408.182 409.545 410.909 412.273 413.636 415.000 415.000 417.143 419.286 421.429 423.571 425.714 427.857 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 460.000 467.216 476.446 488.671
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 0 0 0 45 0 0 0 0 0 0 0 57 0 0 0 0 0 51 45 57 57 0 0 0 57 54 0 0 57 0 0 57 57 54 0 0 60 0 0 0 0 60 0 0 0 0 0 0 0 0 0 48 0 0 0 51 0 63 54 0 0 63 0 0 51 57 0 0 0 60 0 0 57 0 0 0 0 0 0 0 57 54 51 0 0 0 57 57 0 0 0 0 0 0 0 0 60 0 54 57 0 0 54 0 51 0 48 51 48 51 48 51 48 45 45 45 42 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 -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 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 -2.734375
</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" >
89.604 90.0 95.0 100.0 105.0 110.0 114.706 115.0 119.412 120.0 124.118 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 328.738 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.233 1.799 2.319 2.592 2.679 2.556 2.556 2.556 2.571 2.679 2.715 2.9 3.066 3.223 3.375 3.525 3.675 3.824 3.975 4.128 4.283 4.44 4.601 4.764 4.931 5.101 5.276 5.454 5.636 5.822 6.013 6.208 6.408 6.612 6.82 7.034 7.252 7.476 7.704 7.938 8.176 8.42 8.668 8.922 9.179 9.438 9.697 9.95 10.186 10.386 10.518 10.55 10.549 10.535 10.501 10.451 10.385 10.304 10.209 10.103 9.985 9.857 9.721 9.577 9.426 9.269 9.107 8.941 8.771 8.599 8.424 8.248 8.071 7.893 7.715 7.538 7.361 7.186 7.012 6.839 6.668 6.5 6.334 6.17 6.008 5.85 5.694 5.541 5.391 5.244 5.1 4.96 4.822 4.687 4.555 4.427 4.301 4.179 4.059 3.943 3.829 3.719 3.611 3.506 3.404 3.305 3.208 3.114 3.022 2.933 2.846 2.762 2.681 2.601 2.524 2.449 2.376 2.305 2.236 2.169 2.104 2.041 1.98 1.921 1.863 1.807 1.753 1.7 1.649 1.6 1.551 1.505 1.459 1.415 1.373 1.331 1.291 1.252 1.214 1.177 1.142 1.107 1.074 1.041 1.01 0.979 0.95 0.921 0.893 0.866 0.84 0.814 0.79 0.766 0.742 0.72 0.698 0.677 0.656 0.636 0.617 0.598 0.58 0.563 0.546 0.529 0.513 0.497 0.482 0.468 0.454 0.44 0.426 0.413 0.401 0.389 0.377 0.366 0.354 0.344 0.333 0.323 0.313 0.304 0.295 0.286 0.277

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.679" PeakHeight="110.0" Num="3" Error="0.0">
-29.9 12.276 -2.772
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.679" EndFrequency="10.55" PeakHeight="328.738" Num="5" zHalfNm="259.651" Error="2.489">
-158.384 -62.056 15.936 -1.078 0.962
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.118" Depth="0.123"/>
<TopsideChapman PeakHeight="328.738" PeakDensity="1380924.4" PeakScaleHeight="50.671" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
