<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 21:40:00.000"
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" >
2026.03.07 (066) 21:40:00</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">
FF202606603072140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.435" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.298" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="515.000" 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="0.564" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="428.251" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="346.399" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.056" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="119.599" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.285" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.493" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="118.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.990" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="166">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.55 2.6 2.65 2.7 2.75 2.8 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 305.000 306.000 307.000 308.000 309.000 310.000 310.833 311.667 312.500 313.333 314.167 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.833 326.667 327.500 328.333 329.167 330.000 330.000 331.250 332.500 333.750 335.000 335.000 335.000 335.000 335.000 336.667 338.333 340.000 341.667 343.333 345.000 345.000 347.000 349.000 351.000 353.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 365.000 367.000 369.000 371.000 373.000 375.000 380.000 380.000 380.000 382.500 385.000 380.000 380.000 380.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 405.000 406.667 408.333 410.000 415.000 415.000 415.000 417.500 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 445.000 446.667 448.333 450.000 450.000 455.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 480.000 490.000 490.000 494.000 498.000 502.000 506.000 510.000 510.000 515.000 515.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 576.921 584.754 593.691 603.983 615.965 630.089
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 54 57 57 0 0 0 0 63 0 60 0 0 0 66 60 0 0 66 66 0 0 63 63 66 66 66 0 0 0 0 0 69 69 0 0 0 69 0 0 63 0 0 66 0 63 0 66 66 0 0 63 0 54 0 63 66 0 60 0 66 0 69 0 0 69 66 0 63 0 0 0 0 63 48 0 63 0 54 66 0 0 54 0 0 66 54 57 0 66 66 60 63 0 60 60 63 0 0 69 60 66 69 0 66 69 69 63 66 69 69 66 54 0 0 66 63 66 69 63 0 0 66 69 63 69 60 66 69 66 57 63 69 60 66 63 66 63 66 63 66 0 0 63 0 57 60 60 57 57 57 57 0 51 48 51 48 45 48 0 48 48 45 0 42 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
91.264 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.056 140.0 145.0 150.0 155.0 160.0 164.111 165.0 170.0 175.0 180.0 185.0 190.0 191.167 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 428.251 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.373 0.489 0.546 0.564 0.556 0.532 0.49 0.424 0.318 0.252 0.252 0.252 0.252 0.252 0.252 0.252 0.262 0.32 0.378 0.435 0.493 0.551 0.564 0.648 0.74 0.83 0.924 1.023 1.131 1.25 1.382 1.53 1.696 1.882 2.089 2.318 2.566 2.831 3.11 3.399 3.695 3.995 4.297 4.599 4.902 5.204 5.504 5.803 6.101 6.397 6.69 6.982 7.271 7.557 7.84 8.12 8.394 8.664 8.927 9.182 9.427 9.661 9.882 10.086 10.271 10.433 10.569 10.676 10.752 10.792 10.8 10.799 10.787 10.762 10.724 10.674 10.613 10.542 10.461 10.371 10.274 10.168 10.056 9.938 9.814 9.686 9.553 9.416 9.275 9.132 8.987 8.839 8.69 8.539 8.388 8.236 8.083 7.931 7.779 7.627 7.476 7.326 7.176 7.028 6.882 6.736 6.593 6.451 6.31 6.172 6.036 5.901 5.769 5.638 5.51 5.384 5.26 5.138 5.019 4.902 4.787 4.674 4.563 4.455 4.348 4.244 4.142 4.042 3.945 3.849 3.756 3.664 3.575 3.487 3.402 3.318 3.237 3.157 3.079 3.003 2.928 2.856 2.785 2.715 2.648 2.582 2.517 2.454 2.393 2.333 2.274 2.217 2.162 2.107 2.054 2.003 1.952 1.903 1.855 1.808 1.763 1.718 1.675 1.632 1.591 1.551 1.511 1.473 1.436 1.4 1.364 1.329 1.296 1.263 1.231 1.2 1.169 1.139 1.11 1.082 1.055 1.028 1.002 0.976 0.952 0.927

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.564" PeakHeight="110.0" Num="3" Error="0.0">
-23.234 5.013 -0.515
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.564" EndFrequency="10.8" PeakHeight="428.251" Num="5" zHalfNm="346.399" Error="4.863">
-236.615 -5.47 8.354 -7.65 4.297
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="81.167" Depth="0.312"/>
<TopsideChapman PeakHeight="428.251" PeakDensity="1447146.4" PeakScaleHeight="60.493" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
