<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 22:20:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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) 22:20:00</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">
FF202606603072220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.603" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.165" 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="9.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="497.424" 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="0.354" 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="427.572" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="371.123" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.553" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="84.602" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="18.196" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="42.372" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="93.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="113">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 375.833 376.667 377.500 378.333 379.167 380.000 380.000 381.667 383.333 385.000 385.000 385.714 386.429 387.143 387.857 388.571 389.286 390.000 391.000 392.000 393.000 394.000 395.000 396.250 397.500 398.750 400.000 402.500 405.000 405.000 402.500 400.000 400.000 402.500 405.000 405.000 405.000 405.000 405.000 407.500 410.000 412.000 414.000 416.000 418.000 420.000 420.000 420.000 415.000 416.875 418.750 420.625 422.500 424.375 426.250 428.125 430.000 430.000 431.000 432.000 433.000 434.000 435.000 435.000 437.500 440.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 445.000 450.000 450.000 450.000 452.500 455.000 457.500 460.000 460.000 460.000 460.000 460.000 460.000 465.000 465.000 470.000 470.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 485.000 485.000 487.500 490.000 492.059 494.495 497.424 501.011 505.506 511.305 519.068 530.001 546.541 574.489
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 69 0 0 0 0 0 66 66 0 0 60 63 0 0 0 0 0 51 72 0 69 0 0 69 0 0 0 66 48 51 57 0 66 66 0 66 69 0 63 66 48 66 0 0 0 0 51 0 60 0 0 69 0 0 63 0 0 54 57 0 63 0 0 60 63 51 57 60 63 48 0 60 66 66 66 60 66 69 0 0 0 57 63 0 72 72 72 75 75 66 69 54 69 66 69 66 60 63 54 60 0 54 60 48 0 0 0 0 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 -2.734375 -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 -1.171875 -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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -2.734375 -1.171875 -1.171875 -0.390625 -1.171875 2.734375 -1.953125 1.953125 -0.390625 -1.953125 -1.953125 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.587 145.0 150.0 155.0 160.0 165.0 170.0 173.174 175.0 180.0 185.0 190.0 195.0 200.0 204.761 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 427.572 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.326 0.302 0.268 0.22 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.233 0.258 0.282 0.306 0.331 0.354 0.357 0.42 0.493 0.577 0.671 0.771 0.879 0.993 1.112 1.237 1.368 1.504 1.646 1.793 1.947 2.106 2.271 2.443 2.622 2.808 3.0 3.2 3.408 3.623 3.846 4.077 4.317 4.565 4.822 5.087 5.36 5.642 5.931 6.226 6.527 6.831 7.137 7.439 7.734 8.016 8.276 8.504 8.69 8.822 8.891 8.9 8.897 8.874 8.83 8.766 8.684 8.586 8.474 8.349 8.213 8.068 7.914 7.754 7.588 7.417 7.243 7.067 6.889 6.71 6.53 6.352 6.174 5.997 5.822 5.649 5.479 5.312 5.147 4.986 4.828 4.674 4.523 4.375 4.232 4.092 3.955 3.823 3.694 3.569 3.447 3.329 3.215 3.104 2.997 2.893 2.792 2.695 2.6 2.509 2.421 2.336 2.253 2.173 2.096 2.022 1.95 1.881 1.814 1.749 1.687 1.626 1.568 1.512 1.458 1.405 1.355 1.306 1.259 1.214 1.17 1.128 1.088 1.049 1.011 0.974 0.939 0.905 0.873 0.841 0.811 0.782 0.753 0.726 0.7 0.675 0.65 0.627 0.604 0.582 0.561 0.541 0.521 0.503 0.484 0.467 0.45 0.434 0.418 0.403 0.388 0.374 0.361 0.348 0.335 0.323 0.311 0.3 0.289 0.279 0.269 0.259 0.249 0.24 0.232 0.223 0.215

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.9" PeakHeight="427.572" Num="5" zHalfNm="371.123" Error="1.177">
-203.259 -35.498 20.214 -4.04 -0.228
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="94.761" Depth="0.154"/>
<TopsideChapman PeakHeight="427.572" PeakDensity="982754.3" PeakScaleHeight="42.372" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
