<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 23:00:00.000"
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) 23:00:00</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">
FF202606603072300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.463" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.606" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="450.956" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="383.777" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.065" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="99.472" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.298" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.359" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="102.780" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.700" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="163">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
350.000 352.500 355.000 355.714 356.429 357.143 357.857 358.571 359.286 360.000 360.000 360.000 360.750 361.500 362.250 363.000 363.750 364.500 365.250 366.000 366.750 367.500 368.250 369.000 369.750 370.500 371.250 372.000 372.750 373.500 374.250 375.000 376.667 378.333 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 386.667 388.333 390.000 391.000 392.000 393.000 394.000 395.000 396.000 397.000 398.000 399.000 400.000 401.000 402.000 403.000 402.000 401.000 400.000 402.500 405.000 405.000 406.667 408.333 410.000 410.000 410.000 410.000 411.250 412.500 413.750 415.000 415.000 415.000 415.000 415.000 416.667 418.333 420.000 425.000 425.000 425.000 425.000 427.500 430.000 425.000 426.667 428.333 430.000 430.000 430.000 435.000 437.500 440.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 455.000 460.000 460.000 460.000 462.500 465.000 465.000 465.000 465.000 465.000 470.000 475.000 475.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 490.000 495.000 497.500 500.000 500.000 502.500 505.000 507.500 510.000 511.000 512.000 513.000 514.000 515.000 517.500 520.000 525.000 530.000 530.000 540.000 545.000 550.000 555.000 555.000 561.573 569.000 577.458 587.179 598.469 611.740
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 63 0 0 0 0 0 0 0 51 66 0 0 0 0 0 0 0 0 69 0 0 0 0 0 0 60 0 0 0 69 0 0 60 0 66 0 69 54 66 63 63 66 0 63 0 0 60 0 0 0 0 0 0 0 0 51 63 0 0 0 0 0 69 0 69 69 0 0 60 0 69 72 0 57 0 69 72 63 72 69 0 0 69 51 57 69 63 0 57 69 0 0 75 69 69 72 0 63 72 72 57 57 66 69 72 66 75 63 69 66 78 60 0 72 57 57 60 66 60 63 63 51 0 66 69 66 66 63 69 63 69 66 60 0 57 54 0 63 0 60 0 0 0 0 51 51 54 0 0 45 48 45 48 42 0 51 0 0 0 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 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 -0.390625 0.390625 -2.734375 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 1.171875 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 2.734375 1.171875 0.390625 1.171875 1.171875 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 1.171875 0.390625 0.390625 0.390625 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 1.953125 -2.734375 1.171875 1.171875 1.171875 1.953125 -2.734375 1.953125 1.953125 1.171875 1.953125 1.953125 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 2.734375 -1.171875 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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.792 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.583 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.375 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 450.956 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.343 0.329 0.309 0.28 0.241 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.234 0.257 0.279 0.302 0.325 0.348 0.354 0.406 0.478 0.554 0.636 0.724 0.818 0.921 1.033 1.153 1.283 1.423 1.572 1.733 1.904 2.085 2.278 2.481 2.695 2.919 3.154 3.399 3.655 3.92 4.195 4.48 4.773 5.075 5.386 5.704 6.028 6.359 6.695 7.035 7.377 7.721 8.063 8.401 8.734 9.057 9.366 9.658 9.928 10.17 10.38 10.552 10.681 10.765 10.799 10.8 10.793 10.767 10.723 10.661 10.584 10.492 10.387 10.271 10.143 10.006 9.86 9.707 9.548 9.383 9.213 9.039 8.862 8.683 8.502 8.32 8.137 7.954 7.771 7.589 7.408 7.228 7.05 6.874 6.699 6.528 6.358 6.191 6.027 5.866 5.708 5.553 5.401 5.252 5.106 4.963 4.824 4.688 4.555 4.425 4.298 4.175 4.054 3.937 3.823 3.711 3.603 3.497 3.395 3.295 3.197 3.103 3.011 2.921 2.835 2.75 2.668 2.588 2.511 2.436 2.363 2.292 2.223 2.156 2.091 2.028 1.967 1.907 1.85 1.794 1.74 1.687 1.636 1.586 1.538 1.491 1.446 1.402 1.36 1.318 1.278 1.239 1.202 1.165 1.13 1.095 1.062 1.03 0.998 0.968 0.938 0.91 0.882 0.855 0.829 0.804 0.779 0.756 0.733 0.71 0.689 0.668 0.647 0.627 0.608 0.59

</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="10.8" PeakHeight="450.956" Num="5" zHalfNm="383.777" Error="3.004">
-228.821 -20.865 11.999 -2.998 1.104
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.375" Depth="0.154"/>
<TopsideChapman PeakHeight="450.956" PeakDensity="1447146.4" PeakScaleHeight="50.359" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
