<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 20:00:00.000"
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: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.07 (066) 20:00:00</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">
FF202606603072000009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.540" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.462" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.900" 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="475.000" 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="2.284" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="374.715" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="276.726" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.695" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="134.586" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.929" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.232" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="149.230" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="170">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 240.000 245.000 246.000 247.000 248.000 249.000 250.000 250.000 252.500 255.000 255.000 255.000 255.000 255.000 255.000 257.000 259.000 261.000 263.000 265.000 265.000 266.000 267.000 268.000 269.000 270.000 270.000 270.000 270.000 271.000 272.000 273.000 274.000 275.000 280.000 281.667 283.333 285.000 286.250 287.500 288.750 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 302.500 305.000 305.000 308.333 311.667 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 327.500 330.000 330.000 332.500 335.000 340.000 340.000 345.000 345.000 345.000 347.500 350.000 350.000 352.500 355.000 355.000 355.000 355.000 360.000 360.000 360.000 363.333 366.667 370.000 370.000 370.000 372.500 375.000 375.000 380.000 380.000 380.000 380.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 402.000 404.000 406.000 408.000 410.000 410.000 410.000 415.000 420.000 420.000 420.000 422.500 425.000 425.000 430.000 432.500 435.000 435.000 430.000 432.500 435.000 445.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 465.000 470.000 470.000 470.000 475.000 475.000 480.000 490.000 490.000 495.000 500.000 500.000 507.500 515.000 520.000 525.000 530.000 535.000 540.000 547.500 555.000 563.658 573.190 583.736 595.466 608.592
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 60 57 0 0 0 0 51 51 51 54 0 66 66 0 54 0 57 0 0 0 0 0 0 0 0 0 54 0 57 0 0 48 0 57 57 0 0 57 0 0 0 57 63 0 66 60 0 66 0 66 66 69 69 66 45 69 66 0 0 51 60 0 0 69 63 66 69 66 60 0 63 63 0 57 0 0 63 57 60 48 54 60 0 60 66 51 60 66 69 66 66 69 72 0 45 60 0 72 63 75 69 57 66 66 69 45 57 60 66 60 66 69 66 60 0 57 0 0 57 63 63 69 60 66 69 0 69 72 66 0 57 63 69 0 0 51 54 60 54 48 57 54 60 54 42 57 57 54 51 45 45 51 54 51 54 0 51 45 0 45 48 45 0 45 0 42 0 45 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 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 -1.953125 -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 -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 -1.171875 -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 -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 -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" >
89.687 90.0 95.0 100.0 105.0 110.0 115.0 116.685 120.0 123.371 125.0 130.0 130.056 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 374.715 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.532 1.978 2.21 2.284 2.214 2.157 2.157 2.157 2.188 2.283 2.284 2.413 2.539 2.665 2.793 2.925 3.062 3.206 3.358 3.518 3.689 3.871 4.065 4.271 4.489 4.717 4.955 5.2 5.451 5.704 5.958 6.211 6.463 6.711 6.956 7.197 7.434 7.668 7.898 8.125 8.348 8.569 8.787 9.002 9.214 9.424 9.632 9.836 10.039 10.238 10.433 10.623 10.807 10.983 11.147 11.295 11.421 11.519 11.58 11.6 11.6 11.594 11.576 11.549 11.511 11.464 11.409 11.345 11.273 11.194 11.108 11.016 10.917 10.814 10.706 10.593 10.476 10.355 10.231 10.104 9.974 9.842 9.708 9.572 9.434 9.296 9.156 9.016 8.876 8.735 8.594 8.453 8.312 8.172 8.032 7.893 7.755 7.617 7.481 7.346 7.212 7.079 6.947 6.817 6.689 6.562 6.436 6.312 6.19 6.069 5.95 5.833 5.718 5.604 5.492 5.381 5.273 5.166 5.061 4.958 4.857 4.757 4.659 4.563 4.468 4.375 4.284 4.195 4.107 4.021 3.936 3.853 3.772 3.692 3.614 3.538 3.462 3.389 3.316 3.246 3.176 3.108 3.042 2.977 2.913 2.85 2.789 2.729 2.67 2.612 2.556 2.501 2.446 2.393 2.342 2.291 2.241 2.193 2.145 2.098 2.053 2.008 1.964 1.922 1.88 1.839 1.799 1.759 1.721 1.683 1.647 1.611 1.576 1.541 1.507 1.474 1.442 1.411 1.38 1.35 1.32 1.291 1.263 1.235 1.208 1.182

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.284" PeakHeight="110.0" Num="3" Error="0.0">
-29.461 11.655 -2.507
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.284" EndFrequency="11.6" PeakHeight="374.715" Num="5" zHalfNm="276.726" Error="4.873">
-215.25 -38.685 16.151 -10.889 4.014
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="20.056" Depth="0.127"/>
<TopsideChapman PeakHeight="374.715" PeakDensity="1669478.9" PeakScaleHeight="70.232" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
