<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 19:30:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.19 (078) 19:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607803191930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.843" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.564" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="88" Val="10.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="441.328" 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="2.527" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="325.366" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="258.664" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.682" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="88.231" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.068" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.979" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="117.260" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.110" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="138">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 242.500 245.000 247.500 250.000 255.000 256.389 257.778 259.167 260.556 261.944 263.333 264.722 266.111 267.500 268.889 270.278 271.667 273.056 274.444 275.833 277.222 278.611 280.000 280.000 282.500 285.000 290.000 290.000 290.625 291.250 291.875 292.500 293.125 293.750 294.375 295.000 300.000 300.000 301.379 302.759 304.138 305.517 306.897 308.276 309.655 311.034 312.414 313.793 315.172 316.552 317.931 319.310 320.690 322.069 323.448 324.828 326.207 327.586 328.966 330.345 331.724 333.103 334.483 335.862 337.241 338.621 340.000 340.833 341.667 342.500 343.333 344.167 345.000 350.000 351.538 353.077 354.615 356.154 357.692 359.231 360.769 362.308 363.846 365.385 366.923 368.462 370.000 370.000 371.667 373.333 375.000 380.000 381.250 382.500 383.750 385.000 385.000 385.000 390.000 391.053 392.105 393.158 394.211 395.263 396.316 397.368 398.421 399.474 400.526 401.579 402.632 403.684 404.737 405.789 406.842 407.895 408.947 410.000 415.000 415.000 415.000 417.500 420.000 420.000 422.500 425.000 430.000 430.000 435.000 437.898 441.328 445.451 450.500 456.828 464.990 475.918
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 0 45 45 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 48 0 54 54 57 0 0 51 0 0 60 0 48 60 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 0 0 0 57 0 60 54 0 0 0 0 0 0 0 0 0 0 0 0 57 63 0 0 60 51 0 45 0 57 0 63 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 51 54 60 0 57 54 0 54 51 54 51 0 51 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 -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 -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 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 1.953125 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -2.734375 0.390625 -0.390625 2.734375 -2.734375 1.953125 2.734375
</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" >
89.635 90.0 95.0 100.0 105.0 110.0 115.0 115.448 120.0 120.897 125.0 126.345 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 325.366 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.697 2.188 2.445 2.527 2.423 2.403 2.403 2.403 2.496 2.527 2.619 2.745 2.871 3.0 3.132 3.269 3.41 3.556 3.709 3.867 4.032 4.204 4.383 4.568 4.76 4.958 5.162 5.371 5.585 5.803 6.026 6.251 6.48 6.711 6.944 7.18 7.418 7.658 7.9 8.144 8.391 8.641 8.893 9.147 9.403 9.659 9.908 10.138 10.32 10.4 10.4 10.391 10.361 10.312 10.245 10.162 10.064 9.952 9.829 9.694 9.551 9.399 9.239 9.074 8.903 8.728 8.55 8.369 8.186 8.002 7.817 7.632 7.447 7.263 7.081 6.899 6.72 6.543 6.368 6.195 6.026 5.859 5.695 5.534 5.377 5.222 5.072 4.924 4.78 4.639 4.502 4.368 4.237 4.11 3.986 3.865 3.747 3.633 3.522 3.414 3.309 3.206 3.107 3.011 2.917 2.827 2.738 2.653 2.57 2.489 2.411 2.335 2.262 2.191 2.122 2.055 1.99 1.927 1.866 1.807 1.749 1.694 1.64 1.588 1.538 1.489 1.441 1.395 1.351 1.308 1.266 1.226 1.187 1.149 1.112 1.077 1.043 1.009 0.977 0.946 0.916 0.886 0.858 0.831 0.804 0.778 0.753 0.729 0.706 0.683 0.662 0.64 0.62 0.6 0.581 0.562 0.544 0.527 0.51 0.494 0.478 0.463 0.448 0.433 0.42 0.406 0.393 0.38 0.368 0.357 0.345 0.334 0.323 0.313 0.303 0.293 0.284 0.275 0.266 0.257 0.249 0.241 0.233 0.226 0.219 0.212

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.527" PeakHeight="110.0" Num="3" Error="0.0">
-29.744 12.053 -2.674
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.527" EndFrequency="10.4" PeakHeight="325.366" Num="5" zHalfNm="258.664" Error="2.054">
-151.273 -58.862 14.834 -5.464 1.744
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.345" Depth="0.124"/>
<TopsideChapman PeakHeight="325.366" PeakDensity="1341935.5" PeakScaleHeight="47.979" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
