<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 22:00:00.000"
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: 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) 22:00:00</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">
FF202606603072200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.382" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.607" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="10.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="550.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.365" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="463.132" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="378.866" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.811" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="123.492" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.412" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.141" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="122.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="160">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 340.000 340.000 345.000 346.000 347.000 348.000 349.000 350.000 351.000 352.000 353.000 354.000 355.000 356.000 357.000 358.000 359.000 360.000 360.000 360.714 361.429 362.143 362.857 363.571 364.286 365.000 366.667 368.333 370.000 370.000 370.000 370.000 370.000 370.000 372.000 374.000 376.000 378.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 382.500 385.000 385.000 387.500 390.000 390.000 390.000 390.000 390.000 390.000 391.667 393.333 395.000 395.833 396.667 397.500 398.333 399.167 400.000 400.833 401.667 402.500 403.333 404.167 405.000 410.000 410.000 410.000 411.667 413.333 415.000 416.667 418.333 420.000 421.667 423.333 425.000 425.000 425.000 425.000 430.000 430.000 431.250 432.500 433.750 435.000 435.000 440.000 440.000 440.000 440.000 445.000 445.000 447.500 450.000 450.000 450.000 450.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 460.000 465.000 466.667 468.333 470.000 470.000 475.000 475.000 475.000 480.000 480.000 485.000 490.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 505.000 505.000 505.000 505.000 510.000 515.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 550.000 550.000 557.500 565.000 570.000 575.000 581.264 588.162 595.794 604.286 613.790 624.499 636.658 650.582 666.687
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 54 69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 63 0 0 0 0 0 0 69 0 0 60 0 63 69 0 60 0 0 0 51 57 0 0 60 0 69 72 0 63 66 51 57 0 66 66 69 72 0 0 69 0 57 0 63 0 0 0 57 0 63 0 66 63 0 69 0 0 66 48 0 60 0 48 54 60 0 66 54 57 0 0 0 60 66 54 63 66 69 57 63 0 54 60 66 69 66 63 63 66 60 66 66 66 66 0 0 66 69 66 69 63 66 66 69 60 66 69 63 66 60 66 60 63 63 63 0 63 0 60 57 60 0 0 51 51 57 57 0 54 51 48 48 51 48 51 51 48 48 45 45
</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 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 1.953125 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -0.390625 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125
</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" >
93.265 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.851 140.0 145.0 150.0 155.0 160.0 165.0 169.702 170.0 175.0 180.0 185.0 190.0 195.0 199.553 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 463.132 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 0.316 0.353 0.365 0.361 0.35 0.331 0.302 0.26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.229 0.257 0.285 0.312 0.34 0.365 0.37 0.431 0.495 0.562 0.635 0.714 0.8 0.895 0.998 1.111 1.234 1.369 1.514 1.672 1.841 2.022 2.215 2.419 2.635 2.861 3.097 3.342 3.596 3.858 4.128 4.404 4.686 4.974 5.266 5.562 5.861 6.162 6.465 6.768 7.07 7.371 7.669 7.962 8.25 8.531 8.803 9.064 9.314 9.55 9.769 9.972 10.154 10.315 10.453 10.566 10.653 10.713 10.744 10.75 10.749 10.738 10.714 10.679 10.633 10.577 10.511 10.437 10.354 10.263 10.165 10.061 9.951 9.836 9.716 9.591 9.463 9.331 9.197 9.06 8.92 8.779 8.637 8.493 8.349 8.204 8.058 7.913 7.768 7.623 7.479 7.335 7.193 7.051 6.911 6.771 6.634 6.497 6.363 6.23 6.098 5.969 5.841 5.715 5.591 5.469 5.349 5.231 5.115 5.001 4.889 4.779 4.671 4.565 4.461 4.359 4.26 4.162 4.066 3.972 3.879 3.789 3.701 3.614 3.53 3.447 3.366 3.287 3.209 3.133 3.059 2.986 2.915 2.846 2.778 2.712 2.647 2.584 2.522 2.462 2.403 2.345 2.289 2.234 2.18 2.127 2.076 2.026 1.977 1.929 1.883 1.837 1.793 1.75 1.707 1.666 1.625 1.586 1.548 1.51 1.473 1.438 1.403 1.369 1.335 1.303 1.271 1.24

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.365" PeakHeight="110.0" Num="3" Error="0.0">
-19.174 2.598 -0.159
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.365" EndFrequency="10.75" PeakHeight="463.132" Num="5" zHalfNm="378.866" Error="3.548">
-264.374 -2.64 4.684 -2.672 1.423
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="89.553" Depth="0.165"/>
<TopsideChapman PeakHeight="463.132" PeakDensity="1433777.9" PeakScaleHeight="63.141" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
